# Google Cloud Datastore API . projects

## Instance Methods

Allocates IDs for the given keys, which is useful for referencing an entity

Begins a new transaction.

Commits a transaction, optionally creating, deleting or modifying some

Looks up entities by key.

Rolls back a transaction.

Queries for entities.

### Method Details

`allocateIds(projectId, body, x__xgafv=None)`

    Allocates IDs for the given keys, which is useful for referencing an entity
    before it is inserted.

    Args:
      projectId: string, The ID of the project against which to make the request. (required)
      body: object, The request body. (required)
        The object takes the form of:

    { # The request for Datastore.AllocateIds.
        "keys": [ # A list of keys with incomplete key paths for which to allocate IDs.
            # No key may be reserved/read-only.
          { # A unique identifier for an entity.
              # If a key's partition ID or any of its path kinds or names are
              # reserved/read-only, the key is reserved/read-only.
              # A reserved/read-only key is forbidden in certain documented contexts.
            "path": [ # The entity path.
                # An entity path consists of one or more elements composed of a kind and a
                # string or numerical identifier, which identify entities. The first
                # element identifies a _root entity_, the second element identifies
                # a _child_ of the root entity, the third element identifies a child of the
                # second entity, and so forth. The entities identified by all prefixes of
                # the path are called the element's _ancestors_.
                #
                # An entity path is always fully complete: *all* of the entity's ancestors
                # are required to be in the path along with the entity identifier itself.
                # The only exception is that in some documented cases, the identifier in the
                # last path element (for the entity) itself may be omitted. For example,
                # the last path element of the key of `Mutation.insert` may have no
                # identifier.
                #
                # A path can never be empty, and a path can have at most 100 elements.
              { # A (kind, ID/name) pair used to construct a key path.
                  #
                  # If either name or ID is set, the element is complete.
                  # If neither is set, the element is incomplete.
                "kind": "A String", # The kind of the entity.
                    # A kind matching regex `__.*__` is reserved/read-only.
                    # A kind must not contain more than 1500 bytes when UTF-8 encoded.
                    # Cannot be `""`.
                "id": "A String", # The auto-allocated ID of the entity.
                    # Never equal to zero. Values less than zero are discouraged and may not
                    # be supported in the future.
                "name": "A String", # The name of the entity.
                    # A name matching regex `__.*__` is reserved/read-only.
                    # A name must not be more than 1500 bytes when UTF-8 encoded.
                    # Cannot be `""`.
              },
            ],
            "partitionId": { # A partition ID identifies a grouping of entities. The grouping is always # Entities are partitioned into subsets, currently identified by a project
                # ID and namespace ID.
                # Queries are scoped to a single partition.
                # by project and namespace, however the namespace ID may be empty.
                #
                # A partition ID contains several dimensions:
                # project ID and namespace ID.
                #
                # Partition dimensions:
                #
                # - May be `""`.
                # - Must be valid UTF-8 bytes.
                # - Must have values that match regex `[A-Za-z\d\.\-_]{1,100}`
                # If the value of any dimension matches regex `__.*__`, the partition is
                # reserved/read-only.
                # A reserved/read-only partition ID is forbidden in certain documented
                # contexts.
                #
                # Foreign partition IDs (in which the project ID does
                # not match the context project ID ) are discouraged.
                # Reads and writes of foreign partition IDs may fail if the project is not in an active state.
              "projectId": "A String", # The ID of the project to which the entities belong.
              "namespaceId": "A String", # If not empty, the ID of the namespace to which the entities belong.
            },
          },
        ],
      }

      x__xgafv: string, V1 error format.
        Allowed values
          1 - v1 error format
          2 - v2 error format

    Returns:
      An object of the form:

        { # The response for Datastore.AllocateIds.
        "keys": [ # The keys specified in the request (in the same order), each with
            # its key path completed with a newly allocated ID.
          { # A unique identifier for an entity.
              # If a key's partition ID or any of its path kinds or names are
              # reserved/read-only, the key is reserved/read-only.
              # A reserved/read-only key is forbidden in certain documented contexts.
            "path": [ # The entity path.
                # An entity path consists of one or more elements composed of a kind and a
                # string or numerical identifier, which identify entities. The first
                # element identifies a _root entity_, the second element identifies
                # a _child_ of the root entity, the third element identifies a child of the
                # second entity, and so forth. The entities identified by all prefixes of
                # the path are called the element's _ancestors_.
                #
                # An entity path is always fully complete: *all* of the entity's ancestors
                # are required to be in the path along with the entity identifier itself.
                # The only exception is that in some documented cases, the identifier in the
                # last path element (for the entity) itself may be omitted. For example,
                # the last path element of the key of `Mutation.insert` may have no
                # identifier.
                #
                # A path can never be empty, and a path can have at most 100 elements.
              { # A (kind, ID/name) pair used to construct a key path.
                  #
                  # If either name or ID is set, the element is complete.
                  # If neither is set, the element is incomplete.
                "kind": "A String", # The kind of the entity.
                    # A kind matching regex `__.*__` is reserved/read-only.
                    # A kind must not contain more than 1500 bytes when UTF-8 encoded.
                    # Cannot be `""`.
                "id": "A String", # The auto-allocated ID of the entity.
                    # Never equal to zero. Values less than zero are discouraged and may not
                    # be supported in the future.
                "name": "A String", # The name of the entity.
                    # A name matching regex `__.*__` is reserved/read-only.
                    # A name must not be more than 1500 bytes when UTF-8 encoded.
                    # Cannot be `""`.
              },
            ],
            "partitionId": { # A partition ID identifies a grouping of entities. The grouping is always # Entities are partitioned into subsets, currently identified by a project
                # ID and namespace ID.
                # Queries are scoped to a single partition.
                # by project and namespace, however the namespace ID may be empty.
                #
                # A partition ID contains several dimensions:
                # project ID and namespace ID.
                #
                # Partition dimensions:
                #
                # - May be `""`.
                # - Must be valid UTF-8 bytes.
                # - Must have values that match regex `[A-Za-z\d\.\-_]{1,100}`
                # If the value of any dimension matches regex `__.*__`, the partition is
                # reserved/read-only.
                # A reserved/read-only partition ID is forbidden in certain documented
                # contexts.
                #
                # Foreign partition IDs (in which the project ID does
                # not match the context project ID ) are discouraged.
                # Reads and writes of foreign partition IDs may fail if the project is not in an active state.
              "projectId": "A String", # The ID of the project to which the entities belong.
              "namespaceId": "A String", # If not empty, the ID of the namespace to which the entities belong.
            },
          },
        ],
      }

`beginTransaction(projectId, body, x__xgafv=None)`

    Begins a new transaction.

    Args:
      projectId: string, The ID of the project against which to make the request. (required)
      body: object, The request body. (required)
        The object takes the form of:

    { # The request for Datastore.BeginTransaction.
      }

      x__xgafv: string, V1 error format.
        Allowed values
          1 - v1 error format
          2 - v2 error format

    Returns:
      An object of the form:

        { # The response for Datastore.BeginTransaction.
        "transaction": "A String", # The transaction identifier (always present).
      }

`commit(projectId, body, x__xgafv=None)`

    Commits a transaction, optionally creating, deleting or modifying some
    entities.

    Args:
      projectId: string, The ID of the project against which to make the request. (required)
      body: object, The request body. (required)
        The object takes the form of:

    { # The request for Datastore.Commit.
        "transaction": "A String", # The identifier of the transaction associated with the commit. A
            # transaction identifier is returned by a call to
            # Datastore.BeginTransaction.
        "mode": "A String", # The type of commit to perform. Defaults to `TRANSACTIONAL`.
        "mutations": [ # The mutations to perform.
            #
            # When mode is `TRANSACTIONAL`, mutations affecting a single entity are
            # applied in order. The following sequences of mutations affecting a single
            # entity are not permitted in a single `Commit` request:
            #
            # - `insert` followed by `insert`
            # - `update` followed by `insert`
            # - `upsert` followed by `insert`
            # - `delete` followed by `update`
            #
            # When mode is `NON_TRANSACTIONAL`, no two mutations may affect a single
            # entity.
          { # A mutation to apply to an entity.
            "insert": { # A Datastore data object. # The entity to insert. The entity must not already exist.
                # The entity key's final path element may be incomplete.
                #
                # An entity is limited to 1 megabyte when stored. That _roughly_
                # corresponds to a limit of 1 megabyte for the serialized form of this
                # message.
              "properties": { # The entity's properties.
                  # The map's keys are property names.
                  # A property name matching regex `__.*__` is reserved.
                  # A reserved property name is forbidden in certain documented contexts.
                  # The name must not contain more than 500 characters.
                  # The name cannot be `""`.
                "a_key": { # A message that can hold any of the supported value types and associated
                    # metadata.
                  "entityValue": # Object with schema name: Entity # An entity value.
                      #
                      # - May have no key.
                      # - May have a key with an incomplete key path.
                      # - May have a reserved/read-only key.
                  "timestampValue": "A String", # A timestamp value.
                      # When stored in the Datastore, precise only to microseconds;
                      # any additional precision is rounded down.
                  "geoPointValue": { # An object representing a latitude/longitude pair. This is expressed as a pair # A geo point value representing a point on the surface of Earth.
                      # of doubles representing degrees latitude and degrees longitude. Unless
                      # specified otherwise, this must conform to the
                      # WGS84
                      # standard. Values must be within normalized ranges.
                      #
                      # Example of normalization code in Python:
                      #
                      #     def NormalizeLongitude(longitude):
                      #       """Wraps decimal degrees longitude to [-180.0, 180.0]."""
                      #       q, r = divmod(longitude, 360.0)
                      #       if r > 180.0 or (r == 180.0 and q <= -1.0):
                      #         return r - 360.0
                      #       return r
                      #
                      #     def NormalizeLatLng(latitude, longitude):
                      #       """Wraps decimal degrees latitude and longitude to
                      #       [-90.0, 90.0] and [-180.0, 180.0], respectively."""
                      #       r = latitude % 360.0
                      #       if r <= 90.0:
                      #         return r, NormalizeLongitude(longitude)
                      #       elif r >= 270.0:
                      #         return r - 360, NormalizeLongitude(longitude)
                      #       else:
                      #         return 180 - r, NormalizeLongitude(longitude + 180.0)
                      #
                      #     assert 180.0 == NormalizeLongitude(180.0)
                      #     assert -180.0 == NormalizeLongitude(-180.0)
                      #     assert -179.0 == NormalizeLongitude(181.0)
                      #     assert (0.0, 0.0) == NormalizeLatLng(360.0, 0.0)
                      #     assert (0.0, 0.0) == NormalizeLatLng(-360.0, 0.0)
                      #     assert (85.0, 180.0) == NormalizeLatLng(95.0, 0.0)
                      #     assert (-85.0, -170.0) == NormalizeLatLng(-95.0, 10.0)
                      #     assert (90.0, 10.0) == NormalizeLatLng(90.0, 10.0)
                      #     assert (-90.0, -10.0) == NormalizeLatLng(-90.0, -10.0)
                      #     assert (0.0, -170.0) == NormalizeLatLng(-180.0, 10.0)
                      #     assert (0.0, -170.0) == NormalizeLatLng(180.0, 10.0)
                      #     assert (-90.0, 10.0) == NormalizeLatLng(270.0, 10.0)
                      #     assert (90.0, 10.0) == NormalizeLatLng(-270.0, 10.0)
                    "latitude": 3.14, # The latitude in degrees. It must be in the range [-90.0, +90.0].
                    "longitude": 3.14, # The longitude in degrees. It must be in the range [-180.0, +180.0].
                  },
                  "doubleValue": 3.14, # A double value.
                  "meaning": 42, # The `meaning` field should only be populated for backwards compatibility.
                  "excludeFromIndexes": True or False, # If the value should be excluded from all indexes including those defined
                      # explicitly.
                  "keyValue": { # A unique identifier for an entity. # A key value.
                      # If a key's partition ID or any of its path kinds or names are
                      # reserved/read-only, the key is reserved/read-only.
                      # A reserved/read-only key is forbidden in certain documented contexts.
                    "path": [ # The entity path.
                        # An entity path consists of one or more elements composed of a kind and a
                        # string or numerical identifier, which identify entities. The first
                        # element identifies a _root entity_, the second element identifies
                        # a _child_ of the root entity, the third element identifies a child of the
                        # second entity, and so forth. The entities identified by all prefixes of
                        # the path are called the element's _ancestors_.
                        #
                        # An entity path is always fully complete: *all* of the entity's ancestors
                        # are required to be in the path along with the entity identifier itself.
                        # The only exception is that in some documented cases, the identifier in the
                        # last path element (for the entity) itself may be omitted. For example,
                        # the last path element of the key of `Mutation.insert` may have no
                        # identifier.
                        #
                        # A path can never be empty, and a path can have at most 100 elements.
                      { # A (kind, ID/name) pair used to construct a key path.
                          #
                          # If either name or ID is set, the element is complete.
                          # If neither is set, the element is incomplete.
                        "kind": "A String", # The kind of the entity.
                            # A kind matching regex `__.*__` is reserved/read-only.
                            # A kind must not contain more than 1500 bytes when UTF-8 encoded.
                            # Cannot be `""`.
                        "id": "A String", # The auto-allocated ID of the entity.
                            # Never equal to zero. Values less than zero are discouraged and may not
                            # be supported in the future.
                        "name": "A String", # The name of the entity.
                            # A name matching regex `__.*__` is reserved/read-only.
                            # A name must not be more than 1500 bytes when UTF-8 encoded.
                            # Cannot be `""`.
                      },
                    ],
                    "partitionId": { # A partition ID identifies a grouping of entities. The grouping is always # Entities are partitioned into subsets, currently identified by a project
                        # ID and namespace ID.
                        # Queries are scoped to a single partition.
                        # by project and namespace, however the namespace ID may be empty.
                        #
                        # A partition ID contains several dimensions:
                        # project ID and namespace ID.
                        #
                        # Partition dimensions:
                        #
                        # - May be `""`.
                        # - Must be valid UTF-8 bytes.
                        # - Must have values that match regex `[A-Za-z\d\.\-_]{1,100}`
                        # If the value of any dimension matches regex `__.*__`, the partition is
                        # reserved/read-only.
                        # A reserved/read-only partition ID is forbidden in certain documented
                        # contexts.
                        #
                        # Foreign partition IDs (in which the project ID does
                        # not match the context project ID ) are discouraged.
                        # Reads and writes of foreign partition IDs may fail if the project is not in an active state.
                      "projectId": "A String", # The ID of the project to which the entities belong.
                      "namespaceId": "A String", # If not empty, the ID of the namespace to which the entities belong.
                    },
                  },
                  "stringValue": "A String", # A UTF-8 encoded string value.
                      # When `exclude_from_indexes` is false (it is indexed) , may have at most 1500 bytes.
                      # Otherwise, may be set to at least 1,000,000 bytes.
                  "blobValue": "A String", # A blob value.
                      # May have at most 1,000,000 bytes.
                      # When `exclude_from_indexes` is false, may have at most 1500 bytes.
                      # In JSON requests, must be base64-encoded.
                  "booleanValue": True or False, # A boolean value.
                  "arrayValue": { # An array value. # An array value.
                      # Cannot contain another array value.
                      # A `Value` instance that sets field `array_value` must not set fields
                      # `meaning` or `exclude_from_indexes`.
                    "values": [ # Values in the array.
                        # The order of this array may not be preserved if it contains a mix of
                        # indexed and unindexed values.
                      # Object with schema name: Value
                    ],
                  },
                  "integerValue": "A String", # An integer value.
                  "nullValue": "A String", # A null value.
                },
              },
              "key": { # A unique identifier for an entity. # The entity's key.
                  #
                  # An entity must have a key, unless otherwise documented (for example,
                  # an entity in `Value.entity_value` may have no key).
                  # An entity's kind is its key path's last element's kind,
                  # or null if it has no key.
                  # If a key's partition ID or any of its path kinds or names are
                  # reserved/read-only, the key is reserved/read-only.
                  # A reserved/read-only key is forbidden in certain documented contexts.
                "path": [ # The entity path.
                    # An entity path consists of one or more elements composed of a kind and a
                    # string or numerical identifier, which identify entities. The first
                    # element identifies a _root entity_, the second element identifies
                    # a _child_ of the root entity, the third element identifies a child of the
                    # second entity, and so forth. The entities identified by all prefixes of
                    # the path are called the element's _ancestors_.
                    #
                    # An entity path is always fully complete: *all* of the entity's ancestors
                    # are required to be in the path along with the entity identifier itself.
                    # The only exception is that in some documented cases, the identifier in the
                    # last path element (for the entity) itself may be omitted. For example,
                    # the last path element of the key of `Mutation.insert` may have no
                    # identifier.
                    #
                    # A path can never be empty, and a path can have at most 100 elements.
                  { # A (kind, ID/name) pair used to construct a key path.
                      #
                      # If either name or ID is set, the element is complete.
                      # If neither is set, the element is incomplete.
                    "kind": "A String", # The kind of the entity.
                        # A kind matching regex `__.*__` is reserved/read-only.
                        # A kind must not contain more than 1500 bytes when UTF-8 encoded.
                        # Cannot be `""`.
                    "id": "A String", # The auto-allocated ID of the entity.
                        # Never equal to zero. Values less than zero are discouraged and may not
                        # be supported in the future.
                    "name": "A String", # The name of the entity.
                        # A name matching regex `__.*__` is reserved/read-only.
                        # A name must not be more than 1500 bytes when UTF-8 encoded.
                        # Cannot be `""`.
                  },
                ],
                "partitionId": { # A partition ID identifies a grouping of entities. The grouping is always # Entities are partitioned into subsets, currently identified by a project
                    # ID and namespace ID.
                    # Queries are scoped to a single partition.
                    # by project and namespace, however the namespace ID may be empty.
                    #
                    # A partition ID contains several dimensions:
                    # project ID and namespace ID.
                    #
                    # Partition dimensions:
                    #
                    # - May be `""`.
                    # - Must be valid UTF-8 bytes.
                    # - Must have values that match regex `[A-Za-z\d\.\-_]{1,100}`
                    # If the value of any dimension matches regex `__.*__`, the partition is
                    # reserved/read-only.
                    # A reserved/read-only partition ID is forbidden in certain documented
                    # contexts.
                    #
                    # Foreign partition IDs (in which the project ID does
                    # not match the context project ID ) are discouraged.
                    # Reads and writes of foreign partition IDs may fail if the project is not in an active state.
                  "projectId": "A String", # The ID of the project to which the entities belong.
                  "namespaceId": "A String", # If not empty, the ID of the namespace to which the entities belong.
                },
              },
            },
            "upsert": { # A Datastore data object. # The entity to upsert. The entity may or may not already exist.
                # The entity key's final path element may be incomplete.
                #
                # An entity is limited to 1 megabyte when stored. That _roughly_
                # corresponds to a limit of 1 megabyte for the serialized form of this
                # message.
              "properties": { # The entity's properties.
                  # The map's keys are property names.
                  # A property name matching regex `__.*__` is reserved.
                  # A reserved property name is forbidden in certain documented contexts.
                  # The name must not contain more than 500 characters.
                  # The name cannot be `""`.
                "a_key": { # A message that can hold any of the supported value types and associated
                    # metadata.
                  "entityValue": # Object with schema name: Entity # An entity value.
                      #
                      # - May have no key.
                      # - May have a key with an incomplete key path.
                      # - May have a reserved/read-only key.
                  "timestampValue": "A String", # A timestamp value.
                      # When stored in the Datastore, precise only to microseconds;
                      # any additional precision is rounded down.
                  "geoPointValue": { # An object representing a latitude/longitude pair. This is expressed as a pair # A geo point value representing a point on the surface of Earth.
                      # of doubles representing degrees latitude and degrees longitude. Unless
                      # specified otherwise, this must conform to the
                      # WGS84
                      # standard. Values must be within normalized ranges.
                      #
                      # Example of normalization code in Python:
                      #
                      #     def NormalizeLongitude(longitude):
                      #       """Wraps decimal degrees longitude to [-180.0, 180.0]."""
                      #       q, r = divmod(longitude, 360.0)
                      #       if r > 180.0 or (r == 180.0 and q <= -1.0):
                      #         return r - 360.0
                      #       return r
                      #
                      #     def NormalizeLatLng(latitude, longitude):
                      #       """Wraps decimal degrees latitude and longitude to
                      #       [-90.0, 90.0] and [-180.0, 180.0], respectively."""
                      #       r = latitude % 360.0
                      #       if r <= 90.0:
                      #         return r, NormalizeLongitude(longitude)
                      #       elif r >= 270.0:
                      #         return r - 360, NormalizeLongitude(longitude)
                      #       else:
                      #         return 180 - r, NormalizeLongitude(longitude + 180.0)
                      #
                      #     assert 180.0 == NormalizeLongitude(180.0)
                      #     assert -180.0 == NormalizeLongitude(-180.0)
                      #     assert -179.0 == NormalizeLongitude(181.0)
                      #     assert (0.0, 0.0) == NormalizeLatLng(360.0, 0.0)
                      #     assert (0.0, 0.0) == NormalizeLatLng(-360.0, 0.0)
                      #     assert (85.0, 180.0) == NormalizeLatLng(95.0, 0.0)
                      #     assert (-85.0, -170.0) == NormalizeLatLng(-95.0, 10.0)
                      #     assert (90.0, 10.0) == NormalizeLatLng(90.0, 10.0)
                      #     assert (-90.0, -10.0) == NormalizeLatLng(-90.0, -10.0)
                      #     assert (0.0, -170.0) == NormalizeLatLng(-180.0, 10.0)
                      #     assert (0.0, -170.0) == NormalizeLatLng(180.0, 10.0)
                      #     assert (-90.0, 10.0) == NormalizeLatLng(270.0, 10.0)
                      #     assert (90.0, 10.0) == NormalizeLatLng(-270.0, 10.0)
                    "latitude": 3.14, # The latitude in degrees. It must be in the range [-90.0, +90.0].
                    "longitude": 3.14, # The longitude in degrees. It must be in the range [-180.0, +180.0].
                  },
                  "doubleValue": 3.14, # A double value.
                  "meaning": 42, # The `meaning` field should only be populated for backwards compatibility.
                  "excludeFromIndexes": True or False, # If the value should be excluded from all indexes including those defined
                      # explicitly.
                  "keyValue": { # A unique identifier for an entity. # A key value.
                      # If a key's partition ID or any of its path kinds or names are
                      # reserved/read-only, the key is reserved/read-only.
                      # A reserved/read-only key is forbidden in certain documented contexts.
                    "path": [ # The entity path.
                        # An entity path consists of one or more elements composed of a kind and a
                        # string or numerical identifier, which identify entities. The first
                        # element identifies a _root entity_, the second element identifies
                        # a _child_ of the root entity, the third element identifies a child of the
                        # second entity, and so forth. The entities identified by all prefixes of
                        # the path are called the element's _ancestors_.
                        #
                        # An entity path is always fully complete: *all* of the entity's ancestors
                        # are required to be in the path along with the entity identifier itself.
                        # The only exception is that in some documented cases, the identifier in the
                        # last path element (for the entity) itself may be omitted. For example,
                        # the last path element of the key of `Mutation.insert` may have no
                        # identifier.
                        #
                        # A path can never be empty, and a path can have at most 100 elements.
                      { # A (kind, ID/name) pair used to construct a key path.
                          #
                          # If either name or ID is set, the element is complete.
                          # If neither is set, the element is incomplete.
                        "kind": "A String", # The kind of the entity.
                            # A kind matching regex `__.*__` is reserved/read-only.
                            # A kind must not contain more than 1500 bytes when UTF-8 encoded.
                            # Cannot be `""`.
                        "id": "A String", # The auto-allocated ID of the entity.
                            # Never equal to zero. Values less than zero are discouraged and may not
                            # be supported in the future.
                        "name": "A String", # The name of the entity.
                            # A name matching regex `__.*__` is reserved/read-only.
                            # A name must not be more than 1500 bytes when UTF-8 encoded.
                            # Cannot be `""`.
                      },
                    ],
                    "partitionId": { # A partition ID identifies a grouping of entities. The grouping is always # Entities are partitioned into subsets, currently identified by a project
                        # ID and namespace ID.
                        # Queries are scoped to a single partition.
                        # by project and namespace, however the namespace ID may be empty.
                        #
                        # A partition ID contains several dimensions:
                        # project ID and namespace ID.
                        #
                        # Partition dimensions:
                        #
                        # - May be `""`.
                        # - Must be valid UTF-8 bytes.
                        # - Must have values that match regex `[A-Za-z\d\.\-_]{1,100}`
                        # If the value of any dimension matches regex `__.*__`, the partition is
                        # reserved/read-only.
                        # A reserved/read-only partition ID is forbidden in certain documented
                        # contexts.
                        #
                        # Foreign partition IDs (in which the project ID does
                        # not match the context project ID ) are discouraged.
                        # Reads and writes of foreign partition IDs may fail if the project is not in an active state.
                      "projectId": "A String", # The ID of the project to which the entities belong.
                      "namespaceId": "A String", # If not empty, the ID of the namespace to which the entities belong.
                    },
                  },
                  "stringValue": "A String", # A UTF-8 encoded string value.
                      # When `exclude_from_indexes` is false (it is indexed) , may have at most 1500 bytes.
                      # Otherwise, may be set to at least 1,000,000 bytes.
                  "blobValue": "A String", # A blob value.
                      # May have at most 1,000,000 bytes.
                      # When `exclude_from_indexes` is false, may have at most 1500 bytes.
                      # In JSON requests, must be base64-encoded.
                  "booleanValue": True or False, # A boolean value.
                  "arrayValue": { # An array value. # An array value.
                      # Cannot contain another array value.
                      # A `Value` instance that sets field `array_value` must not set fields
                      # `meaning` or `exclude_from_indexes`.
                    "values": [ # Values in the array.
                        # The order of this array may not be preserved if it contains a mix of
                        # indexed and unindexed values.
                      # Object with schema name: Value
                    ],
                  },
                  "integerValue": "A String", # An integer value.
                  "nullValue": "A String", # A null value.
                },
              },
              "key": { # A unique identifier for an entity. # The entity's key.
                  #
                  # An entity must have a key, unless otherwise documented (for example,
                  # an entity in `Value.entity_value` may have no key).
                  # An entity's kind is its key path's last element's kind,
                  # or null if it has no key.
                  # If a key's partition ID or any of its path kinds or names are
                  # reserved/read-only, the key is reserved/read-only.
                  # A reserved/read-only key is forbidden in certain documented contexts.
                "path": [ # The entity path.
                    # An entity path consists of one or more elements composed of a kind and a
                    # string or numerical identifier, which identify entities. The first
                    # element identifies a _root entity_, the second element identifies
                    # a _child_ of the root entity, the third element identifies a child of the
                    # second entity, and so forth. The entities identified by all prefixes of
                    # the path are called the element's _ancestors_.
                    #
                    # An entity path is always fully complete: *all* of the entity's ancestors
                    # are required to be in the path along with the entity identifier itself.
                    # The only exception is that in some documented cases, the identifier in the
                    # last path element (for the entity) itself may be omitted. For example,
                    # the last path element of the key of `Mutation.insert` may have no
                    # identifier.
                    #
                    # A path can never be empty, and a path can have at most 100 elements.
                  { # A (kind, ID/name) pair used to construct a key path.
                      #
                      # If either name or ID is set, the element is complete.
                      # If neither is set, the element is incomplete.
                    "kind": "A String", # The kind of the entity.
                        # A kind matching regex `__.*__` is reserved/read-only.
                        # A kind must not contain more than 1500 bytes when UTF-8 encoded.
                        # Cannot be `""`.
                    "id": "A String", # The auto-allocated ID of the entity.
                        # Never equal to zero. Values less than zero are discouraged and may not
                        # be supported in the future.
                    "name": "A String", # The name of the entity.
                        # A name matching regex `__.*__` is reserved/read-only.
                        # A name must not be more than 1500 bytes when UTF-8 encoded.
                        # Cannot be `""`.
                  },
                ],
                "partitionId": { # A partition ID identifies a grouping of entities. The grouping is always # Entities are partitioned into subsets, currently identified by a project
                    # ID and namespace ID.
                    # Queries are scoped to a single partition.
                    # by project and namespace, however the namespace ID may be empty.
                    #
                    # A partition ID contains several dimensions:
                    # project ID and namespace ID.
                    #
                    # Partition dimensions:
                    #
                    # - May be `""`.
                    # - Must be valid UTF-8 bytes.
                    # - Must have values that match regex `[A-Za-z\d\.\-_]{1,100}`
                    # If the value of any dimension matches regex `__.*__`, the partition is
                    # reserved/read-only.
                    # A reserved/read-only partition ID is forbidden in certain documented
                    # contexts.
                    #
                    # Foreign partition IDs (in which the project ID does
                    # not match the context project ID ) are discouraged.
                    # Reads and writes of foreign partition IDs may fail if the project is not in an active state.
                  "projectId": "A String", # The ID of the project to which the entities belong.
                  "namespaceId": "A String", # If not empty, the ID of the namespace to which the entities belong.
                },
              },
            },
            "update": { # A Datastore data object. # The entity to update. The entity must already exist.
                # Must have a complete key path.
                #
                # An entity is limited to 1 megabyte when stored. That _roughly_
                # corresponds to a limit of 1 megabyte for the serialized form of this
                # message.
              "properties": { # The entity's properties.
                  # The map's keys are property names.
                  # A property name matching regex `__.*__` is reserved.
                  # A reserved property name is forbidden in certain documented contexts.
                  # The name must not contain more than 500 characters.
                  # The name cannot be `""`.
                "a_key": { # A message that can hold any of the supported value types and associated
                    # metadata.
                  "entityValue": # Object with schema name: Entity # An entity value.
                      #
                      # - May have no key.
                      # - May have a key with an incomplete key path.
                      # - May have a reserved/read-only key.
                  "timestampValue": "A String", # A timestamp value.
                      # When stored in the Datastore, precise only to microseconds;
                      # any additional precision is rounded down.
                  "geoPointValue": { # An object representing a latitude/longitude pair. This is expressed as a pair # A geo point value representing a point on the surface of Earth.
                      # of doubles representing degrees latitude and degrees longitude. Unless
                      # specified otherwise, this must conform to the
                      # WGS84
                      # standard. Values must be within normalized ranges.
                      #
                      # Example of normalization code in Python:
                      #
                      #     def NormalizeLongitude(longitude):
                      #       """Wraps decimal degrees longitude to [-180.0, 180.0]."""
                      #       q, r = divmod(longitude, 360.0)
                      #       if r > 180.0 or (r == 180.0 and q <= -1.0):
                      #         return r - 360.0
                      #       return r
                      #
                      #     def NormalizeLatLng(latitude, longitude):
                      #       """Wraps decimal degrees latitude and longitude to
                      #       [-90.0, 90.0] and [-180.0, 180.0], respectively."""
                      #       r = latitude % 360.0
                      #       if r <= 90.0:
                      #         return r, NormalizeLongitude(longitude)
                      #       elif r >= 270.0:
                      #         return r - 360, NormalizeLongitude(longitude)
                      #       else:
                      #         return 180 - r, NormalizeLongitude(longitude + 180.0)
                      #
                      #     assert 180.0 == NormalizeLongitude(180.0)
                      #     assert -180.0 == NormalizeLongitude(-180.0)
                      #     assert -179.0 == NormalizeLongitude(181.0)
                      #     assert (0.0, 0.0) == NormalizeLatLng(360.0, 0.0)
                      #     assert (0.0, 0.0) == NormalizeLatLng(-360.0, 0.0)
                      #     assert (85.0, 180.0) == NormalizeLatLng(95.0, 0.0)
                      #     assert (-85.0, -170.0) == NormalizeLatLng(-95.0, 10.0)
                      #     assert (90.0, 10.0) == NormalizeLatLng(90.0, 10.0)
                      #     assert (-90.0, -10.0) == NormalizeLatLng(-90.0, -10.0)
                      #     assert (0.0, -170.0) == NormalizeLatLng(-180.0, 10.0)
                      #     assert (0.0, -170.0) == NormalizeLatLng(180.0, 10.0)
                      #     assert (-90.0, 10.0) == NormalizeLatLng(270.0, 10.0)
                      #     assert (90.0, 10.0) == NormalizeLatLng(-270.0, 10.0)
                    "latitude": 3.14, # The latitude in degrees. It must be in the range [-90.0, +90.0].
                    "longitude": 3.14, # The longitude in degrees. It must be in the range [-180.0, +180.0].
                  },
                  "doubleValue": 3.14, # A double value.
                  "meaning": 42, # The `meaning` field should only be populated for backwards compatibility.
                  "excludeFromIndexes": True or False, # If the value should be excluded from all indexes including those defined
                      # explicitly.
                  "keyValue": { # A unique identifier for an entity. # A key value.
                      # If a key's partition ID or any of its path kinds or names are
                      # reserved/read-only, the key is reserved/read-only.
                      # A reserved/read-only key is forbidden in certain documented contexts.
                    "path": [ # The entity path.
                        # An entity path consists of one or more elements composed of a kind and a
                        # string or numerical identifier, which identify entities. The first
                        # element identifies a _root entity_, the second element identifies
                        # a _child_ of the root entity, the third element identifies a child of the
                        # second entity, and so forth. The entities identified by all prefixes of
                        # the path are called the element's _ancestors_.
                        #
                        # An entity path is always fully complete: *all* of the entity's ancestors
                        # are required to be in the path along with the entity identifier itself.
                        # The only exception is that in some documented cases, the identifier in the
                        # last path element (for the entity) itself may be omitted. For example,
                        # the last path element of the key of `Mutation.insert` may have no
                        # identifier.
                        #
                        # A path can never be empty, and a path can have at most 100 elements.
                      { # A (kind, ID/name) pair used to construct a key path.
                          #
                          # If either name or ID is set, the element is complete.
                          # If neither is set, the element is incomplete.
                        "kind": "A String", # The kind of the entity.
                            # A kind matching regex `__.*__` is reserved/read-only.
                            # A kind must not contain more than 1500 bytes when UTF-8 encoded.
                            # Cannot be `""`.
                        "id": "A String", # The auto-allocated ID of the entity.
                            # Never equal to zero. Values less than zero are discouraged and may not
                            # be supported in the future.
                        "name": "A String", # The name of the entity.
                            # A name matching regex `__.*__` is reserved/read-only.
                            # A name must not be more than 1500 bytes when UTF-8 encoded.
                            # Cannot be `""`.
                      },
                    ],
                    "partitionId": { # A partition ID identifies a grouping of entities. The grouping is always # Entities are partitioned into subsets, currently identified by a project
                        # ID and namespace ID.
                        # Queries are scoped to a single partition.
                        # by project and namespace, however the namespace ID may be empty.
                        #
                        # A partition ID contains several dimensions:
                        # project ID and namespace ID.
                        #
                        # Partition dimensions:
                        #
                        # - May be `""`.
                        # - Must be valid UTF-8 bytes.
                        # - Must have values that match regex `[A-Za-z\d\.\-_]{1,100}`
                        # If the value of any dimension matches regex `__.*__`, the partition is
                        # reserved/read-only.
                        # A reserved/read-only partition ID is forbidden in certain documented
                        # contexts.
                        #
                        # Foreign partition IDs (in which the project ID does
                        # not match the context project ID ) are discouraged.
                        # Reads and writes of foreign partition IDs may fail if the project is not in an active state.
                      "projectId": "A String", # The ID of the project to which the entities belong.
                      "namespaceId": "A String", # If not empty, the ID of the namespace to which the entities belong.
                    },
                  },
                  "stringValue": "A String", # A UTF-8 encoded string value.
                      # When `exclude_from_indexes` is false (it is indexed) , may have at most 1500 bytes.
                      # Otherwise, may be set to at least 1,000,000 bytes.
                  "blobValue": "A String", # A blob value.
                      # May have at most 1,000,000 bytes.
                      # When `exclude_from_indexes` is false, may have at most 1500 bytes.
                      # In JSON requests, must be base64-encoded.
                  "booleanValue": True or False, # A boolean value.
                  "arrayValue": { # An array value. # An array value.
                      # Cannot contain another array value.
                      # A `Value` instance that sets field `array_value` must not set fields
                      # `meaning` or `exclude_from_indexes`.
                    "values": [ # Values in the array.
                        # The order of this array may not be preserved if it contains a mix of
                        # indexed and unindexed values.
                      # Object with schema name: Value
                    ],
                  },
                  "integerValue": "A String", # An integer value.
                  "nullValue": "A String", # A null value.
                },
              },
              "key": { # A unique identifier for an entity. # The entity's key.
                  #
                  # An entity must have a key, unless otherwise documented (for example,
                  # an entity in `Value.entity_value` may have no key).
                  # An entity's kind is its key path's last element's kind,
                  # or null if it has no key.
                  # If a key's partition ID or any of its path kinds or names are
                  # reserved/read-only, the key is reserved/read-only.
                  # A reserved/read-only key is forbidden in certain documented contexts.
                "path": [ # The entity path.
                    # An entity path consists of one or more elements composed of a kind and a
                    # string or numerical identifier, which identify entities. The first
                    # element identifies a _root entity_, the second element identifies
                    # a _child_ of the root entity, the third element identifies a child of the
                    # second entity, and so forth. The entities identified by all prefixes of
                    # the path are called the element's _ancestors_.
                    #
                    # An entity path is always fully complete: *all* of the entity's ancestors
                    # are required to be in the path along with the entity identifier itself.
                    # The only exception is that in some documented cases, the identifier in the
                    # last path element (for the entity) itself may be omitted. For example,
                    # the last path element of the key of `Mutation.insert` may have no
                    # identifier.
                    #
                    # A path can never be empty, and a path can have at most 100 elements.
                  { # A (kind, ID/name) pair used to construct a key path.
                      #
                      # If either name or ID is set, the element is complete.
                      # If neither is set, the element is incomplete.
                    "kind": "A String", # The kind of the entity.
                        # A kind matching regex `__.*__` is reserved/read-only.
                        # A kind must not contain more than 1500 bytes when UTF-8 encoded.
                        # Cannot be `""`.
                    "id": "A String", # The auto-allocated ID of the entity.
                        # Never equal to zero. Values less than zero are discouraged and may not
                        # be supported in the future.
                    "name": "A String", # The name of the entity.
                        # A name matching regex `__.*__` is reserved/read-only.
                        # A name must not be more than 1500 bytes when UTF-8 encoded.
                        # Cannot be `""`.
                  },
                ],
                "partitionId": { # A partition ID identifies a grouping of entities. The grouping is always # Entities are partitioned into subsets, currently identified by a project
                    # ID and namespace ID.
                    # Queries are scoped to a single partition.
                    # by project and namespace, however the namespace ID may be empty.
                    #
                    # A partition ID contains several dimensions:
                    # project ID and namespace ID.
                    #
                    # Partition dimensions:
                    #
                    # - May be `""`.
                    # - Must be valid UTF-8 bytes.
                    # - Must have values that match regex `[A-Za-z\d\.\-_]{1,100}`
                    # If the value of any dimension matches regex `__.*__`, the partition is
                    # reserved/read-only.
                    # A reserved/read-only partition ID is forbidden in certain documented
                    # contexts.
                    #
                    # Foreign partition IDs (in which the project ID does
                    # not match the context project ID ) are discouraged.
                    # Reads and writes of foreign partition IDs may fail if the project is not in an active state.
                  "projectId": "A String", # The ID of the project to which the entities belong.
                  "namespaceId": "A String", # If not empty, the ID of the namespace to which the entities belong.
                },
              },
            },
            "baseVersion": "A String", # The version of the entity that this mutation is being applied to. If this
                # does not match the current version on the server, the mutation conflicts.
            "delete": { # A unique identifier for an entity. # The key of the entity to delete. The entity may or may not already exist.
                # Must have a complete key path and must not be reserved/read-only.
                # If a key's partition ID or any of its path kinds or names are
                # reserved/read-only, the key is reserved/read-only.
                # A reserved/read-only key is forbidden in certain documented contexts.
              "path": [ # The entity path.
                  # An entity path consists of one or more elements composed of a kind and a
                  # string or numerical identifier, which identify entities. The first
                  # element identifies a _root entity_, the second element identifies
                  # a _child_ of the root entity, the third element identifies a child of the
                  # second entity, and so forth. The entities identified by all prefixes of
                  # the path are called the element's _ancestors_.
                  #
                  # An entity path is always fully complete: *all* of the entity's ancestors
                  # are required to be in the path along with the entity identifier itself.
                  # The only exception is that in some documented cases, the identifier in the
                  # last path element (for the entity) itself may be omitted. For example,
                  # the last path element of the key of `Mutation.insert` may have no
                  # identifier.
                  #
                  # A path can never be empty, and a path can have at most 100 elements.
                { # A (kind, ID/name) pair used to construct a key path.
                    #
                    # If either name or ID is set, the element is complete.
                    # If neither is set, the element is incomplete.
                  "kind": "A String", # The kind of the entity.
                      # A kind matching regex `__.*__` is reserved/read-only.
                      # A kind must not contain more than 1500 bytes when UTF-8 encoded.
                      # Cannot be `""`.
                  "id": "A String", # The auto-allocated ID of the entity.
                      # Never equal to zero. Values less than zero are discouraged and may not
                      # be supported in the future.
                  "name": "A String", # The name of the entity.
                      # A name matching regex `__.*__` is reserved/read-only.
                      # A name must not be more than 1500 bytes when UTF-8 encoded.
                      # Cannot be `""`.
                },
              ],
              "partitionId": { # A partition ID identifies a grouping of entities. The grouping is always # Entities are partitioned into subsets, currently identified by a project
                  # ID and namespace ID.
                  # Queries are scoped to a single partition.
                  # by project and namespace, however the namespace ID may be empty.
                  #
                  # A partition ID contains several dimensions:
                  # project ID and namespace ID.
                  #
                  # Partition dimensions:
                  #
                  # - May be `""`.
                  # - Must be valid UTF-8 bytes.
                  # - Must have values that match regex `[A-Za-z\d\.\-_]{1,100}`
                  # If the value of any dimension matches regex `__.*__`, the partition is
                  # reserved/read-only.
                  # A reserved/read-only partition ID is forbidden in certain documented
                  # contexts.
                  #
                  # Foreign partition IDs (in which the project ID does
                  # not match the context project ID ) are discouraged.
                  # Reads and writes of foreign partition IDs may fail if the project is not in an active state.
                "projectId": "A String", # The ID of the project to which the entities belong.
                "namespaceId": "A String", # If not empty, the ID of the namespace to which the entities belong.
              },
            },
          },
        ],
      }

      x__xgafv: string, V1 error format.
        Allowed values
          1 - v1 error format
          2 - v2 error format

    Returns:
      An object of the form:

        { # The response for Datastore.Commit.
        "mutationResults": [ # The result of performing the mutations.
            # The i-th mutation result corresponds to the i-th mutation in the request.
          { # The result of applying a mutation.
            "version": "A String", # The version of the entity on the server after processing the mutation. If
                # the mutation doesn't change anything on the server, then the version will
                # be the version of the current entity or, if no entity is present, a version
                # that is strictly greater than the version of any previous entity and less
                # than the version of any possible future entity.
            "conflictDetected": True or False, # Whether a conflict was detected for this mutation. Always false when a
                # conflict detection strategy field is not set in the mutation.
            "key": { # A unique identifier for an entity. # The automatically allocated key.
                # Set only when the mutation allocated a key.
                # If a key's partition ID or any of its path kinds or names are
                # reserved/read-only, the key is reserved/read-only.
                # A reserved/read-only key is forbidden in certain documented contexts.
              "path": [ # The entity path.
                  # An entity path consists of one or more elements composed of a kind and a
                  # string or numerical identifier, which identify entities. The first
                  # element identifies a _root entity_, the second element identifies
                  # a _child_ of the root entity, the third element identifies a child of the
                  # second entity, and so forth. The entities identified by all prefixes of
                  # the path are called the element's _ancestors_.
                  #
                  # An entity path is always fully complete: *all* of the entity's ancestors
                  # are required to be in the path along with the entity identifier itself.
                  # The only exception is that in some documented cases, the identifier in the
                  # last path element (for the entity) itself may be omitted. For example,
                  # the last path element of the key of `Mutation.insert` may have no
                  # identifier.
                  #
                  # A path can never be empty, and a path can have at most 100 elements.
                { # A (kind, ID/name) pair used to construct a key path.
                    #
                    # If either name or ID is set, the element is complete.
                    # If neither is set, the element is incomplete.
                  "kind": "A String", # The kind of the entity.
                      # A kind matching regex `__.*__` is reserved/read-only.
                      # A kind must not contain more than 1500 bytes when UTF-8 encoded.
                      # Cannot be `""`.
                  "id": "A String", # The auto-allocated ID of the entity.
                      # Never equal to zero. Values less than zero are discouraged and may not
                      # be supported in the future.
                  "name": "A String", # The name of the entity.
                      # A name matching regex `__.*__` is reserved/read-only.
                      # A name must not be more than 1500 bytes when UTF-8 encoded.
                      # Cannot be `""`.
                },
              ],
              "partitionId": { # A partition ID identifies a grouping of entities. The grouping is always # Entities are partitioned into subsets, currently identified by a project
                  # ID and namespace ID.
                  # Queries are scoped to a single partition.
                  # by project and namespace, however the namespace ID may be empty.
                  #
                  # A partition ID contains several dimensions:
                  # project ID and namespace ID.
                  #
                  # Partition dimensions:
                  #
                  # - May be `""`.
                  # - Must be valid UTF-8 bytes.
                  # - Must have values that match regex `[A-Za-z\d\.\-_]{1,100}`
                  # If the value of any dimension matches regex `__.*__`, the partition is
                  # reserved/read-only.
                  # A reserved/read-only partition ID is forbidden in certain documented
                  # contexts.
                  #
                  # Foreign partition IDs (in which the project ID does
                  # not match the context project ID ) are discouraged.
                  # Reads and writes of foreign partition IDs may fail if the project is not in an active state.
                "projectId": "A String", # The ID of the project to which the entities belong.
                "namespaceId": "A String", # If not empty, the ID of the namespace to which the entities belong.
              },
            },
          },
        ],
        "indexUpdates": 42, # The number of index entries updated during the commit, or zero if none were
            # updated.
      }

`lookup(projectId, body, x__xgafv=None)`

    Looks up entities by key.

    Args:
      projectId: string, The ID of the project against which to make the request. (required)
      body: object, The request body. (required)
        The object takes the form of:

    { # The request for Datastore.Lookup.
        "keys": [ # Keys of entities to look up.
          { # A unique identifier for an entity.
              # If a key's partition ID or any of its path kinds or names are
              # reserved/read-only, the key is reserved/read-only.
              # A reserved/read-only key is forbidden in certain documented contexts.
            "path": [ # The entity path.
                # An entity path consists of one or more elements composed of a kind and a
                # string or numerical identifier, which identify entities. The first
                # element identifies a _root entity_, the second element identifies
                # a _child_ of the root entity, the third element identifies a child of the
                # second entity, and so forth. The entities identified by all prefixes of
                # the path are called the element's _ancestors_.
                #
                # An entity path is always fully complete: *all* of the entity's ancestors
                # are required to be in the path along with the entity identifier itself.
                # The only exception is that in some documented cases, the identifier in the
                # last path element (for the entity) itself may be omitted. For example,
                # the last path element of the key of `Mutation.insert` may have no
                # identifier.
                #
                # A path can never be empty, and a path can have at most 100 elements.
              { # A (kind, ID/name) pair used to construct a key path.
                  #
                  # If either name or ID is set, the element is complete.
                  # If neither is set, the element is incomplete.
                "kind": "A String", # The kind of the entity.
                    # A kind matching regex `__.*__` is reserved/read-only.
                    # A kind must not contain more than 1500 bytes when UTF-8 encoded.
                    # Cannot be `""`.
                "id": "A String", # The auto-allocated ID of the entity.
                    # Never equal to zero. Values less than zero are discouraged and may not
                    # be supported in the future.
                "name": "A String", # The name of the entity.
                    # A name matching regex `__.*__` is reserved/read-only.
                    # A name must not be more than 1500 bytes when UTF-8 encoded.
                    # Cannot be `""`.
              },
            ],
            "partitionId": { # A partition ID identifies a grouping of entities. The grouping is always # Entities are partitioned into subsets, currently identified by a project
                # ID and namespace ID.
                # Queries are scoped to a single partition.
                # by project and namespace, however the namespace ID may be empty.
                #
                # A partition ID contains several dimensions:
                # project ID and namespace ID.
                #
                # Partition dimensions:
                #
                # - May be `""`.
                # - Must be valid UTF-8 bytes.
                # - Must have values that match regex `[A-Za-z\d\.\-_]{1,100}`
                # If the value of any dimension matches regex `__.*__`, the partition is
                # reserved/read-only.
                # A reserved/read-only partition ID is forbidden in certain documented
                # contexts.
                #
                # Foreign partition IDs (in which the project ID does
                # not match the context project ID ) are discouraged.
                # Reads and writes of foreign partition IDs may fail if the project is not in an active state.
              "projectId": "A String", # The ID of the project to which the entities belong.
              "namespaceId": "A String", # If not empty, the ID of the namespace to which the entities belong.
            },
          },
        ],
        "readOptions": { # The options shared by read requests. # The options for this lookup request.
          "transaction": "A String", # The identifier of the transaction in which to read. A
              # transaction identifier is returned by a call to
              # Datastore.BeginTransaction.
          "readConsistency": "A String", # The non-transactional read consistency to use.
              # Cannot be set to `STRONG` for global queries.
        },
      }

      x__xgafv: string, V1 error format.
        Allowed values
          1 - v1 error format
          2 - v2 error format

    Returns:
      An object of the form:

        { # The response for Datastore.Lookup.
        "found": [ # Entities found as `ResultType.FULL` entities. The order of results in this
            # field is undefined and has no relation to the order of the keys in the
            # input.
          { # The result of fetching an entity from Datastore.
            "cursor": "A String", # A cursor that points to the position after the result entity.
                # Set only when the `EntityResult` is part of a `QueryResultBatch` message.
            "version": "A String", # The version of the entity, a strictly positive number that monotonically
                # increases with changes to the entity.
                #
                # This field is set for `FULL` entity
                # results.
                #
                # For missing entities in `LookupResponse`, this
                # is the version of the snapshot that was used to look up the entity, and it
                # is always set except for eventually consistent reads.
            "entity": { # A Datastore data object. # The resulting entity.
                #
                # An entity is limited to 1 megabyte when stored. That _roughly_
                # corresponds to a limit of 1 megabyte for the serialized form of this
                # message.
              "properties": { # The entity's properties.
                  # The map's keys are property names.
                  # A property name matching regex `__.*__` is reserved.
                  # A reserved property name is forbidden in certain documented contexts.
                  # The name must not contain more than 500 characters.
                  # The name cannot be `""`.
                "a_key": { # A message that can hold any of the supported value types and associated
                    # metadata.
                  "entityValue": # Object with schema name: Entity # An entity value.
                      #
                      # - May have no key.
                      # - May have a key with an incomplete key path.
                      # - May have a reserved/read-only key.
                  "timestampValue": "A String", # A timestamp value.
                      # When stored in the Datastore, precise only to microseconds;
                      # any additional precision is rounded down.
                  "geoPointValue": { # An object representing a latitude/longitude pair. This is expressed as a pair # A geo point value representing a point on the surface of Earth.
                      # of doubles representing degrees latitude and degrees longitude. Unless
                      # specified otherwise, this must conform to the
                      # WGS84
                      # standard. Values must be within normalized ranges.
                      #
                      # Example of normalization code in Python:
                      #
                      #     def NormalizeLongitude(longitude):
                      #       """Wraps decimal degrees longitude to [-180.0, 180.0]."""
                      #       q, r = divmod(longitude, 360.0)
                      #       if r > 180.0 or (r == 180.0 and q <= -1.0):
                      #         return r - 360.0
                      #       return r
                      #
                      #     def NormalizeLatLng(latitude, longitude):
                      #       """Wraps decimal degrees latitude and longitude to
                      #       [-90.0, 90.0] and [-180.0, 180.0], respectively."""
                      #       r = latitude % 360.0
                      #       if r <= 90.0:
                      #         return r, NormalizeLongitude(longitude)
                      #       elif r >= 270.0:
                      #         return r - 360, NormalizeLongitude(longitude)
                      #       else:
                      #         return 180 - r, NormalizeLongitude(longitude + 180.0)
                      #
                      #     assert 180.0 == NormalizeLongitude(180.0)
                      #     assert -180.0 == NormalizeLongitude(-180.0)
                      #     assert -179.0 == NormalizeLongitude(181.0)
                      #     assert (0.0, 0.0) == NormalizeLatLng(360.0, 0.0)
                      #     assert (0.0, 0.0) == NormalizeLatLng(-360.0, 0.0)
                      #     assert (85.0, 180.0) == NormalizeLatLng(95.0, 0.0)
                      #     assert (-85.0, -170.0) == NormalizeLatLng(-95.0, 10.0)
                      #     assert (90.0, 10.0) == NormalizeLatLng(90.0, 10.0)
                      #     assert (-90.0, -10.0) == NormalizeLatLng(-90.0, -10.0)
                      #     assert (0.0, -170.0) == NormalizeLatLng(-180.0, 10.0)
                      #     assert (0.0, -170.0) == NormalizeLatLng(180.0, 10.0)
                      #     assert (-90.0, 10.0) == NormalizeLatLng(270.0, 10.0)
                      #     assert (90.0, 10.0) == NormalizeLatLng(-270.0, 10.0)
                    "latitude": 3.14, # The latitude in degrees. It must be in the range [-90.0, +90.0].
                    "longitude": 3.14, # The longitude in degrees. It must be in the range [-180.0, +180.0].
                  },
                  "doubleValue": 3.14, # A double value.
                  "meaning": 42, # The `meaning` field should only be populated for backwards compatibility.
                  "excludeFromIndexes": True or False, # If the value should be excluded from all indexes including those defined
                      # explicitly.
                  "keyValue": { # A unique identifier for an entity. # A key value.
                      # If a key's partition ID or any of its path kinds or names are
                      # reserved/read-only, the key is reserved/read-only.
                      # A reserved/read-only key is forbidden in certain documented contexts.
                    "path": [ # The entity path.
                        # An entity path consists of one or more elements composed of a kind and a
                        # string or numerical identifier, which identify entities. The first
                        # element identifies a _root entity_, the second element identifies
                        # a _child_ of the root entity, the third element identifies a child of the
                        # second entity, and so forth. The entities identified by all prefixes of
                        # the path are called the element's _ancestors_.
                        #
                        # An entity path is always fully complete: *all* of the entity's ancestors
                        # are required to be in the path along with the entity identifier itself.
                        # The only exception is that in some documented cases, the identifier in the
                        # last path element (for the entity) itself may be omitted. For example,
                        # the last path element of the key of `Mutation.insert` may have no
                        # identifier.
                        #
                        # A path can never be empty, and a path can have at most 100 elements.
                      { # A (kind, ID/name) pair used to construct a key path.
                          #
                          # If either name or ID is set, the element is complete.
                          # If neither is set, the element is incomplete.
                        "kind": "A String", # The kind of the entity.
                            # A kind matching regex `__.*__` is reserved/read-only.
                            # A kind must not contain more than 1500 bytes when UTF-8 encoded.
                            # Cannot be `""`.
                        "id": "A String", # The auto-allocated ID of the entity.
                            # Never equal to zero. Values less than zero are discouraged and may not
                            # be supported in the future.
                        "name": "A String", # The name of the entity.
                            # A name matching regex `__.*__` is reserved/read-only.
                            # A name must not be more than 1500 bytes when UTF-8 encoded.
                            # Cannot be `""`.
                      },
                    ],
                    "partitionId": { # A partition ID identifies a grouping of entities. The grouping is always # Entities are partitioned into subsets, currently identified by a project
                        # ID and namespace ID.
                        # Queries are scoped to a single partition.
                        # by project and namespace, however the namespace ID may be empty.
                        #
                        # A partition ID contains several dimensions:
                        # project ID and namespace ID.
                        #
                        # Partition dimensions:
                        #
                        # - May be `""`.
                        # - Must be valid UTF-8 bytes.
                        # - Must have values that match regex `[A-Za-z\d\.\-_]{1,100}`
                        # If the value of any dimension matches regex `__.*__`, the partition is
                        # reserved/read-only.
                        # A reserved/read-only partition ID is forbidden in certain documented
                        # contexts.
                        #
                        # Foreign partition IDs (in which the project ID does
                        # not match the context project ID ) are discouraged.
                        # Reads and writes of foreign partition IDs may fail if the project is not in an active state.
                      "projectId": "A String", # The ID of the project to which the entities belong.
                      "namespaceId": "A String", # If not empty, the ID of the namespace to which the entities belong.
                    },
                  },
                  "stringValue": "A String", # A UTF-8 encoded string value.
                      # When `exclude_from_indexes` is false (it is indexed) , may have at most 1500 bytes.
                      # Otherwise, may be set to at least 1,000,000 bytes.
                  "blobValue": "A String", # A blob value.
                      # May have at most 1,000,000 bytes.
                      # When `exclude_from_indexes` is false, may have at most 1500 bytes.
                      # In JSON requests, must be base64-encoded.
                  "booleanValue": True or False, # A boolean value.
                  "arrayValue": { # An array value. # An array value.
                      # Cannot contain another array value.
                      # A `Value` instance that sets field `array_value` must not set fields
                      # `meaning` or `exclude_from_indexes`.
                    "values": [ # Values in the array.
                        # The order of this array may not be preserved if it contains a mix of
                        # indexed and unindexed values.
                      # Object with schema name: Value
                    ],
                  },
                  "integerValue": "A String", # An integer value.
                  "nullValue": "A String", # A null value.
                },
              },
              "key": { # A unique identifier for an entity. # The entity's key.
                  #
                  # An entity must have a key, unless otherwise documented (for example,
                  # an entity in `Value.entity_value` may have no key).
                  # An entity's kind is its key path's last element's kind,
                  # or null if it has no key.
                  # If a key's partition ID or any of its path kinds or names are
                  # reserved/read-only, the key is reserved/read-only.
                  # A reserved/read-only key is forbidden in certain documented contexts.
                "path": [ # The entity path.
                    # An entity path consists of one or more elements composed of a kind and a
                    # string or numerical identifier, which identify entities. The first
                    # element identifies a _root entity_, the second element identifies
                    # a _child_ of the root entity, the third element identifies a child of the
                    # second entity, and so forth. The entities identified by all prefixes of
                    # the path are called the element's _ancestors_.
                    #
                    # An entity path is always fully complete: *all* of the entity's ancestors
                    # are required to be in the path along with the entity identifier itself.
                    # The only exception is that in some documented cases, the identifier in the
                    # last path element (for the entity) itself may be omitted. For example,
                    # the last path element of the key of `Mutation.insert` may have no
                    # identifier.
                    #
                    # A path can never be empty, and a path can have at most 100 elements.
                  { # A (kind, ID/name) pair used to construct a key path.
                      #
                      # If either name or ID is set, the element is complete.
                      # If neither is set, the element is incomplete.
                    "kind": "A String", # The kind of the entity.
                        # A kind matching regex `__.*__` is reserved/read-only.
                        # A kind must not contain more than 1500 bytes when UTF-8 encoded.
                        # Cannot be `""`.
                    "id": "A String", # The auto-allocated ID of the entity.
                        # Never equal to zero. Values less than zero are discouraged and may not
                        # be supported in the future.
                    "name": "A String", # The name of the entity.
                        # A name matching regex `__.*__` is reserved/read-only.
                        # A name must not be more than 1500 bytes when UTF-8 encoded.
                        # Cannot be `""`.
                  },
                ],
                "partitionId": { # A partition ID identifies a grouping of entities. The grouping is always # Entities are partitioned into subsets, currently identified by a project
                    # ID and namespace ID.
                    # Queries are scoped to a single partition.
                    # by project and namespace, however the namespace ID may be empty.
                    #
                    # A partition ID contains several dimensions:
                    # project ID and namespace ID.
                    #
                    # Partition dimensions:
                    #
                    # - May be `""`.
                    # - Must be valid UTF-8 bytes.
                    # - Must have values that match regex `[A-Za-z\d\.\-_]{1,100}`
                    # If the value of any dimension matches regex `__.*__`, the partition is
                    # reserved/read-only.
                    # A reserved/read-only partition ID is forbidden in certain documented
                    # contexts.
                    #
                    # Foreign partition IDs (in which the project ID does
                    # not match the context project ID ) are discouraged.
                    # Reads and writes of foreign partition IDs may fail if the project is not in an active state.
                  "projectId": "A String", # The ID of the project to which the entities belong.
                  "namespaceId": "A String", # If not empty, the ID of the namespace to which the entities belong.
                },
              },
            },
          },
        ],
        "deferred": [ # A list of keys that were not looked up due to resource constraints. The
            # order of results in this field is undefined and has no relation to the
            # order of the keys in the input.
          { # A unique identifier for an entity.
              # If a key's partition ID or any of its path kinds or names are
              # reserved/read-only, the key is reserved/read-only.
              # A reserved/read-only key is forbidden in certain documented contexts.
            "path": [ # The entity path.
                # An entity path consists of one or more elements composed of a kind and a
                # string or numerical identifier, which identify entities. The first
                # element identifies a _root entity_, the second element identifies
                # a _child_ of the root entity, the third element identifies a child of the
                # second entity, and so forth. The entities identified by all prefixes of
                # the path are called the element's _ancestors_.
                #
                # An entity path is always fully complete: *all* of the entity's ancestors
                # are required to be in the path along with the entity identifier itself.
                # The only exception is that in some documented cases, the identifier in the
                # last path element (for the entity) itself may be omitted. For example,
                # the last path element of the key of `Mutation.insert` may have no
                # identifier.
                #
                # A path can never be empty, and a path can have at most 100 elements.
              { # A (kind, ID/name) pair used to construct a key path.
                  #
                  # If either name or ID is set, the element is complete.
                  # If neither is set, the element is incomplete.
                "kind": "A String", # The kind of the entity.
                    # A kind matching regex `__.*__` is reserved/read-only.
                    # A kind must not contain more than 1500 bytes when UTF-8 encoded.
                    # Cannot be `""`.
                "id": "A String", # The auto-allocated ID of the entity.
                    # Never equal to zero. Values less than zero are discouraged and may not
                    # be supported in the future.
                "name": "A String", # The name of the entity.
                    # A name matching regex `__.*__` is reserved/read-only.
                    # A name must not be more than 1500 bytes when UTF-8 encoded.
                    # Cannot be `""`.
              },
            ],
            "partitionId": { # A partition ID identifies a grouping of entities. The grouping is always # Entities are partitioned into subsets, currently identified by a project
                # ID and namespace ID.
                # Queries are scoped to a single partition.
                # by project and namespace, however the namespace ID may be empty.
                #
                # A partition ID contains several dimensions:
                # project ID and namespace ID.
                #
                # Partition dimensions:
                #
                # - May be `""`.
                # - Must be valid UTF-8 bytes.
                # - Must have values that match regex `[A-Za-z\d\.\-_]{1,100}`
                # If the value of any dimension matches regex `__.*__`, the partition is
                # reserved/read-only.
                # A reserved/read-only partition ID is forbidden in certain documented
                # contexts.
                #
                # Foreign partition IDs (in which the project ID does
                # not match the context project ID ) are discouraged.
                # Reads and writes of foreign partition IDs may fail if the project is not in an active state.
              "projectId": "A String", # The ID of the project to which the entities belong.
              "namespaceId": "A String", # If not empty, the ID of the namespace to which the entities belong.
            },
          },
        ],
        "missing": [ # Entities not found as `ResultType.KEY_ONLY` entities. The order of results
            # in this field is undefined and has no relation to the order of the keys
            # in the input.
          { # The result of fetching an entity from Datastore.
            "cursor": "A String", # A cursor that points to the position after the result entity.
                # Set only when the `EntityResult` is part of a `QueryResultBatch` message.
            "version": "A String", # The version of the entity, a strictly positive number that monotonically
                # increases with changes to the entity.
                #
                # This field is set for `FULL` entity
                # results.
                #
                # For missing entities in `LookupResponse`, this
                # is the version of the snapshot that was used to look up the entity, and it
                # is always set except for eventually consistent reads.
            "entity": { # A Datastore data object. # The resulting entity.
                #
                # An entity is limited to 1 megabyte when stored. That _roughly_
                # corresponds to a limit of 1 megabyte for the serialized form of this
                # message.
              "properties": { # The entity's properties.
                  # The map's keys are property names.
                  # A property name matching regex `__.*__` is reserved.
                  # A reserved property name is forbidden in certain documented contexts.
                  # The name must not contain more than 500 characters.
                  # The name cannot be `""`.
                "a_key": { # A message that can hold any of the supported value types and associated
                    # metadata.
                  "entityValue": # Object with schema name: Entity # An entity value.
                      #
                      # - May have no key.
                      # - May have a key with an incomplete key path.
                      # - May have a reserved/read-only key.
                  "timestampValue": "A String", # A timestamp value.
                      # When stored in the Datastore, precise only to microseconds;
                      # any additional precision is rounded down.
                  "geoPointValue": { # An object representing a latitude/longitude pair. This is expressed as a pair # A geo point value representing a point on the surface of Earth.
                      # of doubles representing degrees latitude and degrees longitude. Unless
                      # specified otherwise, this must conform to the
                      # WGS84
                      # standard. Values must be within normalized ranges.
                      #
                      # Example of normalization code in Python:
                      #
                      #     def NormalizeLongitude(longitude):
                      #       """Wraps decimal degrees longitude to [-180.0, 180.0]."""
                      #       q, r = divmod(longitude, 360.0)
                      #       if r > 180.0 or (r == 180.0 and q <= -1.0):
                      #         return r - 360.0
                      #       return r
                      #
                      #     def NormalizeLatLng(latitude, longitude):
                      #       """Wraps decimal degrees latitude and longitude to
                      #       [-90.0, 90.0] and [-180.0, 180.0], respectively."""
                      #       r = latitude % 360.0
                      #       if r <= 90.0:
                      #         return r, NormalizeLongitude(longitude)
                      #       elif r >= 270.0:
                      #         return r - 360, NormalizeLongitude(longitude)
                      #       else:
                      #         return 180 - r, NormalizeLongitude(longitude + 180.0)
                      #
                      #     assert 180.0 == NormalizeLongitude(180.0)
                      #     assert -180.0 == NormalizeLongitude(-180.0)
                      #     assert -179.0 == NormalizeLongitude(181.0)
                      #     assert (0.0, 0.0) == NormalizeLatLng(360.0, 0.0)
                      #     assert (0.0, 0.0) == NormalizeLatLng(-360.0, 0.0)
                      #     assert (85.0, 180.0) == NormalizeLatLng(95.0, 0.0)
                      #     assert (-85.0, -170.0) == NormalizeLatLng(-95.0, 10.0)
                      #     assert (90.0, 10.0) == NormalizeLatLng(90.0, 10.0)
                      #     assert (-90.0, -10.0) == NormalizeLatLng(-90.0, -10.0)
                      #     assert (0.0, -170.0) == NormalizeLatLng(-180.0, 10.0)
                      #     assert (0.0, -170.0) == NormalizeLatLng(180.0, 10.0)
                      #     assert (-90.0, 10.0) == NormalizeLatLng(270.0, 10.0)
                      #     assert (90.0, 10.0) == NormalizeLatLng(-270.0, 10.0)
                    "latitude": 3.14, # The latitude in degrees. It must be in the range [-90.0, +90.0].
                    "longitude": 3.14, # The longitude in degrees. It must be in the range [-180.0, +180.0].
                  },
                  "doubleValue": 3.14, # A double value.
                  "meaning": 42, # The `meaning` field should only be populated for backwards compatibility.
                  "excludeFromIndexes": True or False, # If the value should be excluded from all indexes including those defined
                      # explicitly.
                  "keyValue": { # A unique identifier for an entity. # A key value.
                      # If a key's partition ID or any of its path kinds or names are
                      # reserved/read-only, the key is reserved/read-only.
                      # A reserved/read-only key is forbidden in certain documented contexts.
                    "path": [ # The entity path.
                        # An entity path consists of one or more elements composed of a kind and a
                        # string or numerical identifier, which identify entities. The first
                        # element identifies a _root entity_, the second element identifies
                        # a _child_ of the root entity, the third element identifies a child of the
                        # second entity, and so forth. The entities identified by all prefixes of
                        # the path are called the element's _ancestors_.
                        #
                        # An entity path is always fully complete: *all* of the entity's ancestors
                        # are required to be in the path along with the entity identifier itself.
                        # The only exception is that in some documented cases, the identifier in the
                        # last path element (for the entity) itself may be omitted. For example,
                        # the last path element of the key of `Mutation.insert` may have no
                        # identifier.
                        #
                        # A path can never be empty, and a path can have at most 100 elements.
                      { # A (kind, ID/name) pair used to construct a key path.
                          #
                          # If either name or ID is set, the element is complete.
                          # If neither is set, the element is incomplete.
                        "kind": "A String", # The kind of the entity.
                            # A kind matching regex `__.*__` is reserved/read-only.
                            # A kind must not contain more than 1500 bytes when UTF-8 encoded.
                            # Cannot be `""`.
                        "id": "A String", # The auto-allocated ID of the entity.
                            # Never equal to zero. Values less than zero are discouraged and may not
                            # be supported in the future.
                        "name": "A String", # The name of the entity.
                            # A name matching regex `__.*__` is reserved/read-only.
                            # A name must not be more than 1500 bytes when UTF-8 encoded.
                            # Cannot be `""`.
                      },
                    ],
                    "partitionId": { # A partition ID identifies a grouping of entities. The grouping is always # Entities are partitioned into subsets, currently identified by a project
                        # ID and namespace ID.
                        # Queries are scoped to a single partition.
                        # by project and namespace, however the namespace ID may be empty.
                        #
                        # A partition ID contains several dimensions:
                        # project ID and namespace ID.
                        #
                        # Partition dimensions:
                        #
                        # - May be `""`.
                        # - Must be valid UTF-8 bytes.
                        # - Must have values that match regex `[A-Za-z\d\.\-_]{1,100}`
                        # If the value of any dimension matches regex `__.*__`, the partition is
                        # reserved/read-only.
                        # A reserved/read-only partition ID is forbidden in certain documented
                        # contexts.
                        #
                        # Foreign partition IDs (in which the project ID does
                        # not match the context project ID ) are discouraged.
                        # Reads and writes of foreign partition IDs may fail if the project is not in an active state.
                      "projectId": "A String", # The ID of the project to which the entities belong.
                      "namespaceId": "A String", # If not empty, the ID of the namespace to which the entities belong.
                    },
                  },
                  "stringValue": "A String", # A UTF-8 encoded string value.
                      # When `exclude_from_indexes` is false (it is indexed) , may have at most 1500 bytes.
                      # Otherwise, may be set to at least 1,000,000 bytes.
                  "blobValue": "A String", # A blob value.
                      # May have at most 1,000,000 bytes.
                      # When `exclude_from_indexes` is false, may have at most 1500 bytes.
                      # In JSON requests, must be base64-encoded.
                  "booleanValue": True or False, # A boolean value.
                  "arrayValue": { # An array value. # An array value.
                      # Cannot contain another array value.
                      # A `Value` instance that sets field `array_value` must not set fields
                      # `meaning` or `exclude_from_indexes`.
                    "values": [ # Values in the array.
                        # The order of this array may not be preserved if it contains a mix of
                        # indexed and unindexed values.
                      # Object with schema name: Value
                    ],
                  },
                  "integerValue": "A String", # An integer value.
                  "nullValue": "A String", # A null value.
                },
              },
              "key": { # A unique identifier for an entity. # The entity's key.
                  #
                  # An entity must have a key, unless otherwise documented (for example,
                  # an entity in `Value.entity_value` may have no key).
                  # An entity's kind is its key path's last element's kind,
                  # or null if it has no key.
                  # If a key's partition ID or any of its path kinds or names are
                  # reserved/read-only, the key is reserved/read-only.
                  # A reserved/read-only key is forbidden in certain documented contexts.
                "path": [ # The entity path.
                    # An entity path consists of one or more elements composed of a kind and a
                    # string or numerical identifier, which identify entities. The first
                    # element identifies a _root entity_, the second element identifies
                    # a _child_ of the root entity, the third element identifies a child of the
                    # second entity, and so forth. The entities identified by all prefixes of
                    # the path are called the element's _ancestors_.
                    #
                    # An entity path is always fully complete: *all* of the entity's ancestors
                    # are required to be in the path along with the entity identifier itself.
                    # The only exception is that in some documented cases, the identifier in the
                    # last path element (for the entity) itself may be omitted. For example,
                    # the last path element of the key of `Mutation.insert` may have no
                    # identifier.
                    #
                    # A path can never be empty, and a path can have at most 100 elements.
                  { # A (kind, ID/name) pair used to construct a key path.
                      #
                      # If either name or ID is set, the element is complete.
                      # If neither is set, the element is incomplete.
                    "kind": "A String", # The kind of the entity.
                        # A kind matching regex `__.*__` is reserved/read-only.
                        # A kind must not contain more than 1500 bytes when UTF-8 encoded.
                        # Cannot be `""`.
                    "id": "A String", # The auto-allocated ID of the entity.
                        # Never equal to zero. Values less than zero are discouraged and may not
                        # be supported in the future.
                    "name": "A String", # The name of the entity.
                        # A name matching regex `__.*__` is reserved/read-only.
                        # A name must not be more than 1500 bytes when UTF-8 encoded.
                        # Cannot be `""`.
                  },
                ],
                "partitionId": { # A partition ID identifies a grouping of entities. The grouping is always # Entities are partitioned into subsets, currently identified by a project
                    # ID and namespace ID.
                    # Queries are scoped to a single partition.
                    # by project and namespace, however the namespace ID may be empty.
                    #
                    # A partition ID contains several dimensions:
                    # project ID and namespace ID.
                    #
                    # Partition dimensions:
                    #
                    # - May be `""`.
                    # - Must be valid UTF-8 bytes.
                    # - Must have values that match regex `[A-Za-z\d\.\-_]{1,100}`
                    # If the value of any dimension matches regex `__.*__`, the partition is
                    # reserved/read-only.
                    # A reserved/read-only partition ID is forbidden in certain documented
                    # contexts.
                    #
                    # Foreign partition IDs (in which the project ID does
                    # not match the context project ID ) are discouraged.
                    # Reads and writes of foreign partition IDs may fail if the project is not in an active state.
                  "projectId": "A String", # The ID of the project to which the entities belong.
                  "namespaceId": "A String", # If not empty, the ID of the namespace to which the entities belong.
                },
              },
            },
          },
        ],
      }

`rollback(projectId, body, x__xgafv=None)`

    Rolls back a transaction.

    Args:
      projectId: string, The ID of the project against which to make the request. (required)
      body: object, The request body. (required)
        The object takes the form of:

    { # The request for Datastore.Rollback.
        "transaction": "A String", # The transaction identifier, returned by a call to
            # Datastore.BeginTransaction.
      }

      x__xgafv: string, V1 error format.
        Allowed values
          1 - v1 error format
          2 - v2 error format

    Returns:
      An object of the form:

        { # The response for Datastore.Rollback.
          # (an empty message).
      }

`runQuery(projectId, body, x__xgafv=None)`

    Queries for entities.

    Args:
      projectId: string, The ID of the project against which to make the request. (required)
      body: object, The request body. (required)
        The object takes the form of:

    { # The request for Datastore.RunQuery.
        "query": { # A query for entities. # The query to run.
          "startCursor": "A String", # A starting point for the query results. Query cursors are
              # returned in query result batches and
              # [can only be used to continue the same query](https://cloud.google.com/datastore/docs/concepts/queries#cursors_limits_and_offsets).
          "kind": [ # The kinds to query (if empty, returns entities of all kinds).
              # Currently at most 1 kind may be specified.
            { # A representation of a kind.
              "name": "A String", # The name of the kind.
            },
          ],
          "projection": [ # The projection to return. Defaults to returning all properties.
            { # A representation of a property in a projection.
              "property": { # A reference to a property relative to the kind expressions. # The property to project.
                "name": "A String", # The name of the property.
                    # If name includes "."s, it may be interpreted as a property name path.
              },
            },
          ],
          "distinctOn": [ # The properties to make distinct. The query results will contain the first
              # result for each distinct combination of values for the given properties
              # (if empty, all results are returned).
            { # A reference to a property relative to the kind expressions.
              "name": "A String", # The name of the property.
                  # If name includes "."s, it may be interpreted as a property name path.
            },
          ],
          "filter": { # A holder for any type of filter. # The filter to apply.
            "compositeFilter": { # A filter that merges multiple other filters using the given operator. # A composite filter.
              "filters": [ # The list of filters to combine.
                  # Must contain at least one filter.
                # Object with schema name: Filter
              ],
              "op": "A String", # The operator for combining multiple filters.
            },
            "propertyFilter": { # A filter on a specific property. # A filter on a property.
              "property": { # A reference to a property relative to the kind expressions. # The property to filter by.
                "name": "A String", # The name of the property.
                    # If name includes "."s, it may be interpreted as a property name path.
              },
              "value": { # A message that can hold any of the supported value types and associated # The value to compare the property to.
                  # metadata.
                "entityValue": # Object with schema name: Entity # An entity value.
                    #
                    # - May have no key.
                    # - May have a key with an incomplete key path.
                    # - May have a reserved/read-only key.
                "timestampValue": "A String", # A timestamp value.
                    # When stored in the Datastore, precise only to microseconds;
                    # any additional precision is rounded down.
                "geoPointValue": { # An object representing a latitude/longitude pair. This is expressed as a pair # A geo point value representing a point on the surface of Earth.
                    # of doubles representing degrees latitude and degrees longitude. Unless
                    # specified otherwise, this must conform to the
                    # WGS84
                    # standard. Values must be within normalized ranges.
                    #
                    # Example of normalization code in Python:
                    #
                    #     def NormalizeLongitude(longitude):
                    #       """Wraps decimal degrees longitude to [-180.0, 180.0]."""
                    #       q, r = divmod(longitude, 360.0)
                    #       if r > 180.0 or (r == 180.0 and q <= -1.0):
                    #         return r - 360.0
                    #       return r
                    #
                    #     def NormalizeLatLng(latitude, longitude):
                    #       """Wraps decimal degrees latitude and longitude to
                    #       [-90.0, 90.0] and [-180.0, 180.0], respectively."""
                    #       r = latitude % 360.0
                    #       if r <= 90.0:
                    #         return r, NormalizeLongitude(longitude)
                    #       elif r >= 270.0:
                    #         return r - 360, NormalizeLongitude(longitude)
                    #       else:
                    #         return 180 - r, NormalizeLongitude(longitude + 180.0)
                    #
                    #     assert 180.0 == NormalizeLongitude(180.0)
                    #     assert -180.0 == NormalizeLongitude(-180.0)
                    #     assert -179.0 == NormalizeLongitude(181.0)
                    #     assert (0.0, 0.0) == NormalizeLatLng(360.0, 0.0)
                    #     assert (0.0, 0.0) == NormalizeLatLng(-360.0, 0.0)
                    #     assert (85.0, 180.0) == NormalizeLatLng(95.0, 0.0)
                    #     assert (-85.0, -170.0) == NormalizeLatLng(-95.0, 10.0)
                    #     assert (90.0, 10.0) == NormalizeLatLng(90.0, 10.0)
                    #     assert (-90.0, -10.0) == NormalizeLatLng(-90.0, -10.0)
                    #     assert (0.0, -170.0) == NormalizeLatLng(-180.0, 10.0)
                    #     assert (0.0, -170.0) == NormalizeLatLng(180.0, 10.0)
                    #     assert (-90.0, 10.0) == NormalizeLatLng(270.0, 10.0)
                    #     assert (90.0, 10.0) == NormalizeLatLng(-270.0, 10.0)
                  "latitude": 3.14, # The latitude in degrees. It must be in the range [-90.0, +90.0].
                  "longitude": 3.14, # The longitude in degrees. It must be in the range [-180.0, +180.0].
                },
                "doubleValue": 3.14, # A double value.
                "meaning": 42, # The `meaning` field should only be populated for backwards compatibility.
                "excludeFromIndexes": True or False, # If the value should be excluded from all indexes including those defined
                    # explicitly.
                "keyValue": { # A unique identifier for an entity. # A key value.
                    # If a key's partition ID or any of its path kinds or names are
                    # reserved/read-only, the key is reserved/read-only.
                    # A reserved/read-only key is forbidden in certain documented contexts.
                  "path": [ # The entity path.
                      # An entity path consists of one or more elements composed of a kind and a
                      # string or numerical identifier, which identify entities. The first
                      # element identifies a _root entity_, the second element identifies
                      # a _child_ of the root entity, the third element identifies a child of the
                      # second entity, and so forth. The entities identified by all prefixes of
                      # the path are called the element's _ancestors_.
                      #
                      # An entity path is always fully complete: *all* of the entity's ancestors
                      # are required to be in the path along with the entity identifier itself.
                      # The only exception is that in some documented cases, the identifier in the
                      # last path element (for the entity) itself may be omitted. For example,
                      # the last path element of the key of `Mutation.insert` may have no
                      # identifier.
                      #
                      # A path can never be empty, and a path can have at most 100 elements.
                    { # A (kind, ID/name) pair used to construct a key path.
                        #
                        # If either name or ID is set, the element is complete.
                        # If neither is set, the element is incomplete.
                      "kind": "A String", # The kind of the entity.
                          # A kind matching regex `__.*__` is reserved/read-only.
                          # A kind must not contain more than 1500 bytes when UTF-8 encoded.
                          # Cannot be `""`.
                      "id": "A String", # The auto-allocated ID of the entity.
                          # Never equal to zero. Values less than zero are discouraged and may not
                          # be supported in the future.
                      "name": "A String", # The name of the entity.
                          # A name matching regex `__.*__` is reserved/read-only.
                          # A name must not be more than 1500 bytes when UTF-8 encoded.
                          # Cannot be `""`.
                    },
                  ],
                  "partitionId": { # A partition ID identifies a grouping of entities. The grouping is always # Entities are partitioned into subsets, currently identified by a project
                      # ID and namespace ID.
                      # Queries are scoped to a single partition.
                      # by project and namespace, however the namespace ID may be empty.
                      #
                      # A partition ID contains several dimensions:
                      # project ID and namespace ID.
                      #
                      # Partition dimensions:
                      #
                      # - May be `""`.
                      # - Must be valid UTF-8 bytes.
                      # - Must have values that match regex `[A-Za-z\d\.\-_]{1,100}`
                      # If the value of any dimension matches regex `__.*__`, the partition is
                      # reserved/read-only.
                      # A reserved/read-only partition ID is forbidden in certain documented
                      # contexts.
                      #
                      # Foreign partition IDs (in which the project ID does
                      # not match the context project ID ) are discouraged.
                      # Reads and writes of foreign partition IDs may fail if the project is not in an active state.
                    "projectId": "A String", # The ID of the project to which the entities belong.
                    "namespaceId": "A String", # If not empty, the ID of the namespace to which the entities belong.
                  },
                },
                "stringValue": "A String", # A UTF-8 encoded string value.
                    # When `exclude_from_indexes` is false (it is indexed) , may have at most 1500 bytes.
                    # Otherwise, may be set to at least 1,000,000 bytes.
                "blobValue": "A String", # A blob value.
                    # May have at most 1,000,000 bytes.
                    # When `exclude_from_indexes` is false, may have at most 1500 bytes.
                    # In JSON requests, must be base64-encoded.
                "booleanValue": True or False, # A boolean value.
                "arrayValue": { # An array value. # An array value.
                    # Cannot contain another array value.
                    # A `Value` instance that sets field `array_value` must not set fields
                    # `meaning` or `exclude_from_indexes`.
                  "values": [ # Values in the array.
                      # The order of this array may not be preserved if it contains a mix of
                      # indexed and unindexed values.
                    # Object with schema name: Value
                  ],
                },
                "integerValue": "A String", # An integer value.
                "nullValue": "A String", # A null value.
              },
              "op": "A String", # The operator to filter by.
            },
          },
          "limit": 42, # The maximum number of results to return. Applies after all other
              # constraints. Optional.
              # Unspecified is interpreted as no limit.
              # Must be >= 0 if specified.
          "offset": 42, # The number of results to skip. Applies before limit, but after all other
              # constraints. Optional. Must be >= 0 if specified.
          "endCursor": "A String", # An ending point for the query results. Query cursors are
              # returned in query result batches and
              # [can only be used to limit the same query](https://cloud.google.com/datastore/docs/concepts/queries#cursors_limits_and_offsets).
          "order": [ # The order to apply to the query results (if empty, order is unspecified).
            { # The desired order for a specific property.
              "direction": "A String", # The direction to order by. Defaults to `ASCENDING`.
              "property": { # A reference to a property relative to the kind expressions. # The property to order by.
                "name": "A String", # The name of the property.
                    # If name includes "."s, it may be interpreted as a property name path.
              },
            },
          ],
        },
        "partitionId": { # A partition ID identifies a grouping of entities. The grouping is always # Entities are partitioned into subsets, identified by a partition ID.
            # Queries are scoped to a single partition.
            # This partition ID is normalized with the standard default context
            # partition ID.
            # by project and namespace, however the namespace ID may be empty.
            #
            # A partition ID contains several dimensions:
            # project ID and namespace ID.
            #
            # Partition dimensions:
            #
            # - May be `""`.
            # - Must be valid UTF-8 bytes.
            # - Must have values that match regex `[A-Za-z\d\.\-_]{1,100}`
            # If the value of any dimension matches regex `__.*__`, the partition is
            # reserved/read-only.
            # A reserved/read-only partition ID is forbidden in certain documented
            # contexts.
            #
            # Foreign partition IDs (in which the project ID does
            # not match the context project ID ) are discouraged.
            # Reads and writes of foreign partition IDs may fail if the project is not in an active state.
          "projectId": "A String", # The ID of the project to which the entities belong.
          "namespaceId": "A String", # If not empty, the ID of the namespace to which the entities belong.
        },
        "gqlQuery": { # A [GQL query](https://cloud.google.com/datastore/docs/apis/gql/gql_reference). # The GQL query to run.
          "namedBindings": { # For each non-reserved named binding site in the query string, there must be
              # a named parameter with that name, but not necessarily the inverse.
              #
              # Key must match regex `A-Za-z_$*`, must not match regex
              # `__.*__`, and must not be `""`.
            "a_key": { # A binding parameter for a GQL query.
              "cursor": "A String", # A query cursor. Query cursors are returned in query
                  # result batches.
              "value": { # A message that can hold any of the supported value types and associated # A value parameter.
                  # metadata.
                "entityValue": # Object with schema name: Entity # An entity value.
                    #
                    # - May have no key.
                    # - May have a key with an incomplete key path.
                    # - May have a reserved/read-only key.
                "timestampValue": "A String", # A timestamp value.
                    # When stored in the Datastore, precise only to microseconds;
                    # any additional precision is rounded down.
                "geoPointValue": { # An object representing a latitude/longitude pair. This is expressed as a pair # A geo point value representing a point on the surface of Earth.
                    # of doubles representing degrees latitude and degrees longitude. Unless
                    # specified otherwise, this must conform to the
                    # WGS84
                    # standard. Values must be within normalized ranges.
                    #
                    # Example of normalization code in Python:
                    #
                    #     def NormalizeLongitude(longitude):
                    #       """Wraps decimal degrees longitude to [-180.0, 180.0]."""
                    #       q, r = divmod(longitude, 360.0)
                    #       if r > 180.0 or (r == 180.0 and q <= -1.0):
                    #         return r - 360.0
                    #       return r
                    #
                    #     def NormalizeLatLng(latitude, longitude):
                    #       """Wraps decimal degrees latitude and longitude to
                    #       [-90.0, 90.0] and [-180.0, 180.0], respectively."""
                    #       r = latitude % 360.0
                    #       if r <= 90.0:
                    #         return r, NormalizeLongitude(longitude)
                    #       elif r >= 270.0:
                    #         return r - 360, NormalizeLongitude(longitude)
                    #       else:
                    #         return 180 - r, NormalizeLongitude(longitude + 180.0)
                    #
                    #     assert 180.0 == NormalizeLongitude(180.0)
                    #     assert -180.0 == NormalizeLongitude(-180.0)
                    #     assert -179.0 == NormalizeLongitude(181.0)
                    #     assert (0.0, 0.0) == NormalizeLatLng(360.0, 0.0)
                    #     assert (0.0, 0.0) == NormalizeLatLng(-360.0, 0.0)
                    #     assert (85.0, 180.0) == NormalizeLatLng(95.0, 0.0)
                    #     assert (-85.0, -170.0) == NormalizeLatLng(-95.0, 10.0)
                    #     assert (90.0, 10.0) == NormalizeLatLng(90.0, 10.0)
                    #     assert (-90.0, -10.0) == NormalizeLatLng(-90.0, -10.0)
                    #     assert (0.0, -170.0) == NormalizeLatLng(-180.0, 10.0)
                    #     assert (0.0, -170.0) == NormalizeLatLng(180.0, 10.0)
                    #     assert (-90.0, 10.0) == NormalizeLatLng(270.0, 10.0)
                    #     assert (90.0, 10.0) == NormalizeLatLng(-270.0, 10.0)
                  "latitude": 3.14, # The latitude in degrees. It must be in the range [-90.0, +90.0].
                  "longitude": 3.14, # The longitude in degrees. It must be in the range [-180.0, +180.0].
                },
                "doubleValue": 3.14, # A double value.
                "meaning": 42, # The `meaning` field should only be populated for backwards compatibility.
                "excludeFromIndexes": True or False, # If the value should be excluded from all indexes including those defined
                    # explicitly.
                "keyValue": { # A unique identifier for an entity. # A key value.
                    # If a key's partition ID or any of its path kinds or names are
                    # reserved/read-only, the key is reserved/read-only.
                    # A reserved/read-only key is forbidden in certain documented contexts.
                  "path": [ # The entity path.
                      # An entity path consists of one or more elements composed of a kind and a
                      # string or numerical identifier, which identify entities. The first
                      # element identifies a _root entity_, the second element identifies
                      # a _child_ of the root entity, the third element identifies a child of the
                      # second entity, and so forth. The entities identified by all prefixes of
                      # the path are called the element's _ancestors_.
                      #
                      # An entity path is always fully complete: *all* of the entity's ancestors
                      # are required to be in the path along with the entity identifier itself.
                      # The only exception is that in some documented cases, the identifier in the
                      # last path element (for the entity) itself may be omitted. For example,
                      # the last path element of the key of `Mutation.insert` may have no
                      # identifier.
                      #
                      # A path can never be empty, and a path can have at most 100 elements.
                    { # A (kind, ID/name) pair used to construct a key path.
                        #
                        # If either name or ID is set, the element is complete.
                        # If neither is set, the element is incomplete.
                      "kind": "A String", # The kind of the entity.
                          # A kind matching regex `__.*__` is reserved/read-only.
                          # A kind must not contain more than 1500 bytes when UTF-8 encoded.
                          # Cannot be `""`.
                      "id": "A String", # The auto-allocated ID of the entity.
                          # Never equal to zero. Values less than zero are discouraged and may not
                          # be supported in the future.
                      "name": "A String", # The name of the entity.
                          # A name matching regex `__.*__` is reserved/read-only.
                          # A name must not be more than 1500 bytes when UTF-8 encoded.
                          # Cannot be `""`.
                    },
                  ],
                  "partitionId": { # A partition ID identifies a grouping of entities. The grouping is always # Entities are partitioned into subsets, currently identified by a project
                      # ID and namespace ID.
                      # Queries are scoped to a single partition.
                      # by project and namespace, however the namespace ID may be empty.
                      #
                      # A partition ID contains several dimensions:
                      # project ID and namespace ID.
                      #
                      # Partition dimensions:
                      #
                      # - May be `""`.
                      # - Must be valid UTF-8 bytes.
                      # - Must have values that match regex `[A-Za-z\d\.\-_]{1,100}`
                      # If the value of any dimension matches regex `__.*__`, the partition is
                      # reserved/read-only.
                      # A reserved/read-only partition ID is forbidden in certain documented
                      # contexts.
                      #
                      # Foreign partition IDs (in which the project ID does
                      # not match the context project ID ) are discouraged.
                      # Reads and writes of foreign partition IDs may fail if the project is not in an active state.
                    "projectId": "A String", # The ID of the project to which the entities belong.
                    "namespaceId": "A String", # If not empty, the ID of the namespace to which the entities belong.
                  },
                },
                "stringValue": "A String", # A UTF-8 encoded string value.
                    # When `exclude_from_indexes` is false (it is indexed) , may have at most 1500 bytes.
                    # Otherwise, may be set to at least 1,000,000 bytes.
                "blobValue": "A String", # A blob value.
                    # May have at most 1,000,000 bytes.
                    # When `exclude_from_indexes` is false, may have at most 1500 bytes.
                    # In JSON requests, must be base64-encoded.
                "booleanValue": True or False, # A boolean value.
                "arrayValue": { # An array value. # An array value.
                    # Cannot contain another array value.
                    # A `Value` instance that sets field `array_value` must not set fields
                    # `meaning` or `exclude_from_indexes`.
                  "values": [ # Values in the array.
                      # The order of this array may not be preserved if it contains a mix of
                      # indexed and unindexed values.
                    # Object with schema name: Value
                  ],
                },
                "integerValue": "A String", # An integer value.
                "nullValue": "A String", # A null value.
              },
            },
          },
          "positionalBindings": [ # Numbered binding site @1 references the first numbered parameter,
              # effectively using 1-based indexing, rather than the usual 0.
              #
              # For each binding site numbered i in `query_string`, there must be an i-th
              # numbered parameter. The inverse must also be true.
            { # A binding parameter for a GQL query.
              "cursor": "A String", # A query cursor. Query cursors are returned in query
                  # result batches.
              "value": { # A message that can hold any of the supported value types and associated # A value parameter.
                  # metadata.
                "entityValue": # Object with schema name: Entity # An entity value.
                    #
                    # - May have no key.
                    # - May have a key with an incomplete key path.
                    # - May have a reserved/read-only key.
                "timestampValue": "A String", # A timestamp value.
                    # When stored in the Datastore, precise only to microseconds;
                    # any additional precision is rounded down.
                "geoPointValue": { # An object representing a latitude/longitude pair. This is expressed as a pair # A geo point value representing a point on the surface of Earth.
                    # of doubles representing degrees latitude and degrees longitude. Unless
                    # specified otherwise, this must conform to the
                    # WGS84
                    # standard. Values must be within normalized ranges.
                    #
                    # Example of normalization code in Python:
                    #
                    #     def NormalizeLongitude(longitude):
                    #       """Wraps decimal degrees longitude to [-180.0, 180.0]."""
                    #       q, r = divmod(longitude, 360.0)
                    #       if r > 180.0 or (r == 180.0 and q <= -1.0):
                    #         return r - 360.0
                    #       return r
                    #
                    #     def NormalizeLatLng(latitude, longitude):
                    #       """Wraps decimal degrees latitude and longitude to
                    #       [-90.0, 90.0] and [-180.0, 180.0], respectively."""
                    #       r = latitude % 360.0
                    #       if r <= 90.0:
                    #         return r, NormalizeLongitude(longitude)
                    #       elif r >= 270.0:
                    #         return r - 360, NormalizeLongitude(longitude)
                    #       else:
                    #         return 180 - r, NormalizeLongitude(longitude + 180.0)
                    #
                    #     assert 180.0 == NormalizeLongitude(180.0)
                    #     assert -180.0 == NormalizeLongitude(-180.0)
                    #     assert -179.0 == NormalizeLongitude(181.0)
                    #     assert (0.0, 0.0) == NormalizeLatLng(360.0, 0.0)
                    #     assert (0.0, 0.0) == NormalizeLatLng(-360.0, 0.0)
                    #     assert (85.0, 180.0) == NormalizeLatLng(95.0, 0.0)
                    #     assert (-85.0, -170.0) == NormalizeLatLng(-95.0, 10.0)
                    #     assert (90.0, 10.0) == NormalizeLatLng(90.0, 10.0)
                    #     assert (-90.0, -10.0) == NormalizeLatLng(-90.0, -10.0)
                    #     assert (0.0, -170.0) == NormalizeLatLng(-180.0, 10.0)
                    #     assert (0.0, -170.0) == NormalizeLatLng(180.0, 10.0)
                    #     assert (-90.0, 10.0) == NormalizeLatLng(270.0, 10.0)
                    #     assert (90.0, 10.0) == NormalizeLatLng(-270.0, 10.0)
                  "latitude": 3.14, # The latitude in degrees. It must be in the range [-90.0, +90.0].
                  "longitude": 3.14, # The longitude in degrees. It must be in the range [-180.0, +180.0].
                },
                "doubleValue": 3.14, # A double value.
                "meaning": 42, # The `meaning` field should only be populated for backwards compatibility.
                "excludeFromIndexes": True or False, # If the value should be excluded from all indexes including those defined
                    # explicitly.
                "keyValue": { # A unique identifier for an entity. # A key value.
                    # If a key's partition ID or any of its path kinds or names are
                    # reserved/read-only, the key is reserved/read-only.
                    # A reserved/read-only key is forbidden in certain documented contexts.
                  "path": [ # The entity path.
                      # An entity path consists of one or more elements composed of a kind and a
                      # string or numerical identifier, which identify entities. The first
                      # element identifies a _root entity_, the second element identifies
                      # a _child_ of the root entity, the third element identifies a child of the
                      # second entity, and so forth. The entities identified by all prefixes of
                      # the path are called the element's _ancestors_.
                      #
                      # An entity path is always fully complete: *all* of the entity's ancestors
                      # are required to be in the path along with the entity identifier itself.
                      # The only exception is that in some documented cases, the identifier in the
                      # last path element (for the entity) itself may be omitted. For example,
                      # the last path element of the key of `Mutation.insert` may have no
                      # identifier.
                      #
                      # A path can never be empty, and a path can have at most 100 elements.
                    { # A (kind, ID/name) pair used to construct a key path.
                        #
                        # If either name or ID is set, the element is complete.
                        # If neither is set, the element is incomplete.
                      "kind": "A String", # The kind of the entity.
                          # A kind matching regex `__.*__` is reserved/read-only.
                          # A kind must not contain more than 1500 bytes when UTF-8 encoded.
                          # Cannot be `""`.
                      "id": "A String", # The auto-allocated ID of the entity.
                          # Never equal to zero. Values less than zero are discouraged and may not
                          # be supported in the future.
                      "name": "A String", # The name of the entity.
                          # A name matching regex `__.*__` is reserved/read-only.
                          # A name must not be more than 1500 bytes when UTF-8 encoded.
                          # Cannot be `""`.
                    },
                  ],
                  "partitionId": { # A partition ID identifies a grouping of entities. The grouping is always # Entities are partitioned into subsets, currently identified by a project
                      # ID and namespace ID.
                      # Queries are scoped to a single partition.
                      # by project and namespace, however the namespace ID may be empty.
                      #
                      # A partition ID contains several dimensions:
                      # project ID and namespace ID.
                      #
                      # Partition dimensions:
                      #
                      # - May be `""`.
                      # - Must be valid UTF-8 bytes.
                      # - Must have values that match regex `[A-Za-z\d\.\-_]{1,100}`
                      # If the value of any dimension matches regex `__.*__`, the partition is
                      # reserved/read-only.
                      # A reserved/read-only partition ID is forbidden in certain documented
                      # contexts.
                      #
                      # Foreign partition IDs (in which the project ID does
                      # not match the context project ID ) are discouraged.
                      # Reads and writes of foreign partition IDs may fail if the project is not in an active state.
                    "projectId": "A String", # The ID of the project to which the entities belong.
                    "namespaceId": "A String", # If not empty, the ID of the namespace to which the entities belong.
                  },
                },
                "stringValue": "A String", # A UTF-8 encoded string value.
                    # When `exclude_from_indexes` is false (it is indexed) , may have at most 1500 bytes.
                    # Otherwise, may be set to at least 1,000,000 bytes.
                "blobValue": "A String", # A blob value.
                    # May have at most 1,000,000 bytes.
                    # When `exclude_from_indexes` is false, may have at most 1500 bytes.
                    # In JSON requests, must be base64-encoded.
                "booleanValue": True or False, # A boolean value.
                "arrayValue": { # An array value. # An array value.
                    # Cannot contain another array value.
                    # A `Value` instance that sets field `array_value` must not set fields
                    # `meaning` or `exclude_from_indexes`.
                  "values": [ # Values in the array.
                      # The order of this array may not be preserved if it contains a mix of
                      # indexed and unindexed values.
                    # Object with schema name: Value
                  ],
                },
                "integerValue": "A String", # An integer value.
                "nullValue": "A String", # A null value.
              },
            },
          ],
          "queryString": "A String", # A string of the format described
              # [here](https://cloud.google.com/datastore/docs/apis/gql/gql_reference).
          "allowLiterals": True or False, # When false, the query string must not contain any literals and instead must
              # bind all values. For example,
              # `SELECT * FROM Kind WHERE a = 'string literal'` is not allowed, while
              # `SELECT * FROM Kind WHERE a = @value` is.
        },
        "readOptions": { # The options shared by read requests. # The options for this query.
          "transaction": "A String", # The identifier of the transaction in which to read. A
              # transaction identifier is returned by a call to
              # Datastore.BeginTransaction.
          "readConsistency": "A String", # The non-transactional read consistency to use.
              # Cannot be set to `STRONG` for global queries.
        },
      }

      x__xgafv: string, V1 error format.
        Allowed values
          1 - v1 error format
          2 - v2 error format

    Returns:
      An object of the form:

        { # The response for Datastore.RunQuery.
        "query": { # A query for entities. # The parsed form of the `GqlQuery` from the request, if it was set.
          "startCursor": "A String", # A starting point for the query results. Query cursors are
              # returned in query result batches and
              # [can only be used to continue the same query](https://cloud.google.com/datastore/docs/concepts/queries#cursors_limits_and_offsets).
          "kind": [ # The kinds to query (if empty, returns entities of all kinds).
              # Currently at most 1 kind may be specified.
            { # A representation of a kind.
              "name": "A String", # The name of the kind.
            },
          ],
          "projection": [ # The projection to return. Defaults to returning all properties.
            { # A representation of a property in a projection.
              "property": { # A reference to a property relative to the kind expressions. # The property to project.
                "name": "A String", # The name of the property.
                    # If name includes "."s, it may be interpreted as a property name path.
              },
            },
          ],
          "distinctOn": [ # The properties to make distinct. The query results will contain the first
              # result for each distinct combination of values for the given properties
              # (if empty, all results are returned).
            { # A reference to a property relative to the kind expressions.
              "name": "A String", # The name of the property.
                  # If name includes "."s, it may be interpreted as a property name path.
            },
          ],
          "filter": { # A holder for any type of filter. # The filter to apply.
            "compositeFilter": { # A filter that merges multiple other filters using the given operator. # A composite filter.
              "filters": [ # The list of filters to combine.
                  # Must contain at least one filter.
                # Object with schema name: Filter
              ],
              "op": "A String", # The operator for combining multiple filters.
            },
            "propertyFilter": { # A filter on a specific property. # A filter on a property.
              "property": { # A reference to a property relative to the kind expressions. # The property to filter by.
                "name": "A String", # The name of the property.
                    # If name includes "."s, it may be interpreted as a property name path.
              },
              "value": { # A message that can hold any of the supported value types and associated # The value to compare the property to.
                  # metadata.
                "entityValue": # Object with schema name: Entity # An entity value.
                    #
                    # - May have no key.
                    # - May have a key with an incomplete key path.
                    # - May have a reserved/read-only key.
                "timestampValue": "A String", # A timestamp value.
                    # When stored in the Datastore, precise only to microseconds;
                    # any additional precision is rounded down.
                "geoPointValue": { # An object representing a latitude/longitude pair. This is expressed as a pair # A geo point value representing a point on the surface of Earth.
                    # of doubles representing degrees latitude and degrees longitude. Unless
                    # specified otherwise, this must conform to the
                    # WGS84
                    # standard. Values must be within normalized ranges.
                    #
                    # Example of normalization code in Python:
                    #
                    #     def NormalizeLongitude(longitude):
                    #       """Wraps decimal degrees longitude to [-180.0, 180.0]."""
                    #       q, r = divmod(longitude, 360.0)
                    #       if r > 180.0 or (r == 180.0 and q <= -1.0):
                    #         return r - 360.0
                    #       return r
                    #
                    #     def NormalizeLatLng(latitude, longitude):
                    #       """Wraps decimal degrees latitude and longitude to
                    #       [-90.0, 90.0] and [-180.0, 180.0], respectively."""
                    #       r = latitude % 360.0
                    #       if r <= 90.0:
                    #         return r, NormalizeLongitude(longitude)
                    #       elif r >= 270.0:
                    #         return r - 360, NormalizeLongitude(longitude)
                    #       else:
                    #         return 180 - r, NormalizeLongitude(longitude + 180.0)
                    #
                    #     assert 180.0 == NormalizeLongitude(180.0)
                    #     assert -180.0 == NormalizeLongitude(-180.0)
                    #     assert -179.0 == NormalizeLongitude(181.0)
                    #     assert (0.0, 0.0) == NormalizeLatLng(360.0, 0.0)
                    #     assert (0.0, 0.0) == NormalizeLatLng(-360.0, 0.0)
                    #     assert (85.0, 180.0) == NormalizeLatLng(95.0, 0.0)
                    #     assert (-85.0, -170.0) == NormalizeLatLng(-95.0, 10.0)
                    #     assert (90.0, 10.0) == NormalizeLatLng(90.0, 10.0)
                    #     assert (-90.0, -10.0) == NormalizeLatLng(-90.0, -10.0)
                    #     assert (0.0, -170.0) == NormalizeLatLng(-180.0, 10.0)
                    #     assert (0.0, -170.0) == NormalizeLatLng(180.0, 10.0)
                    #     assert (-90.0, 10.0) == NormalizeLatLng(270.0, 10.0)
                    #     assert (90.0, 10.0) == NormalizeLatLng(-270.0, 10.0)
                  "latitude": 3.14, # The latitude in degrees. It must be in the range [-90.0, +90.0].
                  "longitude": 3.14, # The longitude in degrees. It must be in the range [-180.0, +180.0].
                },
                "doubleValue": 3.14, # A double value.
                "meaning": 42, # The `meaning` field should only be populated for backwards compatibility.
                "excludeFromIndexes": True or False, # If the value should be excluded from all indexes including those defined
                    # explicitly.
                "keyValue": { # A unique identifier for an entity. # A key value.
                    # If a key's partition ID or any of its path kinds or names are
                    # reserved/read-only, the key is reserved/read-only.
                    # A reserved/read-only key is forbidden in certain documented contexts.
                  "path": [ # The entity path.
                      # An entity path consists of one or more elements composed of a kind and a
                      # string or numerical identifier, which identify entities. The first
                      # element identifies a _root entity_, the second element identifies
                      # a _child_ of the root entity, the third element identifies a child of the
                      # second entity, and so forth. The entities identified by all prefixes of
                      # the path are called the element's _ancestors_.
                      #
                      # An entity path is always fully complete: *all* of the entity's ancestors
                      # are required to be in the path along with the entity identifier itself.
                      # The only exception is that in some documented cases, the identifier in the
                      # last path element (for the entity) itself may be omitted. For example,
                      # the last path element of the key of `Mutation.insert` may have no
                      # identifier.
                      #
                      # A path can never be empty, and a path can have at most 100 elements.
                    { # A (kind, ID/name) pair used to construct a key path.
                        #
                        # If either name or ID is set, the element is complete.
                        # If neither is set, the element is incomplete.
                      "kind": "A String", # The kind of the entity.
                          # A kind matching regex `__.*__` is reserved/read-only.
                          # A kind must not contain more than 1500 bytes when UTF-8 encoded.
                          # Cannot be `""`.
                      "id": "A String", # The auto-allocated ID of the entity.
                          # Never equal to zero. Values less than zero are discouraged and may not
                          # be supported in the future.
                      "name": "A String", # The name of the entity.
                          # A name matching regex `__.*__` is reserved/read-only.
                          # A name must not be more than 1500 bytes when UTF-8 encoded.
                          # Cannot be `""`.
                    },
                  ],
                  "partitionId": { # A partition ID identifies a grouping of entities. The grouping is always # Entities are partitioned into subsets, currently identified by a project
                      # ID and namespace ID.
                      # Queries are scoped to a single partition.
                      # by project and namespace, however the namespace ID may be empty.
                      #
                      # A partition ID contains several dimensions:
                      # project ID and namespace ID.
                      #
                      # Partition dimensions:
                      #
                      # - May be `""`.
                      # - Must be valid UTF-8 bytes.
                      # - Must have values that match regex `[A-Za-z\d\.\-_]{1,100}`
                      # If the value of any dimension matches regex `__.*__`, the partition is
                      # reserved/read-only.
                      # A reserved/read-only partition ID is forbidden in certain documented
                      # contexts.
                      #
                      # Foreign partition IDs (in which the project ID does
                      # not match the context project ID ) are discouraged.
                      # Reads and writes of foreign partition IDs may fail if the project is not in an active state.
                    "projectId": "A String", # The ID of the project to which the entities belong.
                    "namespaceId": "A String", # If not empty, the ID of the namespace to which the entities belong.
                  },
                },
                "stringValue": "A String", # A UTF-8 encoded string value.
                    # When `exclude_from_indexes` is false (it is indexed) , may have at most 1500 bytes.
                    # Otherwise, may be set to at least 1,000,000 bytes.
                "blobValue": "A String", # A blob value.
                    # May have at most 1,000,000 bytes.
                    # When `exclude_from_indexes` is false, may have at most 1500 bytes.
                    # In JSON requests, must be base64-encoded.
                "booleanValue": True or False, # A boolean value.
                "arrayValue": { # An array value. # An array value.
                    # Cannot contain another array value.
                    # A `Value` instance that sets field `array_value` must not set fields
                    # `meaning` or `exclude_from_indexes`.
                  "values": [ # Values in the array.
                      # The order of this array may not be preserved if it contains a mix of
                      # indexed and unindexed values.
                    # Object with schema name: Value
                  ],
                },
                "integerValue": "A String", # An integer value.
                "nullValue": "A String", # A null value.
              },
              "op": "A String", # The operator to filter by.
            },
          },
          "limit": 42, # The maximum number of results to return. Applies after all other
              # constraints. Optional.
              # Unspecified is interpreted as no limit.
              # Must be >= 0 if specified.
          "offset": 42, # The number of results to skip. Applies before limit, but after all other
              # constraints. Optional. Must be >= 0 if specified.
          "endCursor": "A String", # An ending point for the query results. Query cursors are
              # returned in query result batches and
              # [can only be used to limit the same query](https://cloud.google.com/datastore/docs/concepts/queries#cursors_limits_and_offsets).
          "order": [ # The order to apply to the query results (if empty, order is unspecified).
            { # The desired order for a specific property.
              "direction": "A String", # The direction to order by. Defaults to `ASCENDING`.
              "property": { # A reference to a property relative to the kind expressions. # The property to order by.
                "name": "A String", # The name of the property.
                    # If name includes "."s, it may be interpreted as a property name path.
              },
            },
          ],
        },
        "batch": { # A batch of results produced by a query. # A batch of query results (always present).
          "entityResultType": "A String", # The result type for every entity in `entity_results`.
          "snapshotVersion": "A String", # The version number of the snapshot this batch was returned from.
              # This applies to the range of results from the query's `start_cursor` (or
              # the beginning of the query if no cursor was given) to this batch's
              # `end_cursor` (not the query's `end_cursor`).
              #
              # In a single transaction, subsequent query result batches for the same query
              # can have a greater snapshot version number. Each batch's snapshot version
              # is valid for all preceding batches.
              # The value will be zero for eventually consistent queries.
          "skippedResults": 42, # The number of results skipped, typically because of an offset.
          "entityResults": [ # The results for this batch.
            { # The result of fetching an entity from Datastore.
              "cursor": "A String", # A cursor that points to the position after the result entity.
                  # Set only when the `EntityResult` is part of a `QueryResultBatch` message.
              "version": "A String", # The version of the entity, a strictly positive number that monotonically
                  # increases with changes to the entity.
                  #
                  # This field is set for `FULL` entity
                  # results.
                  #
                  # For missing entities in `LookupResponse`, this
                  # is the version of the snapshot that was used to look up the entity, and it
                  # is always set except for eventually consistent reads.
              "entity": { # A Datastore data object. # The resulting entity.
                  #
                  # An entity is limited to 1 megabyte when stored. That _roughly_
                  # corresponds to a limit of 1 megabyte for the serialized form of this
                  # message.
                "properties": { # The entity's properties.
                    # The map's keys are property names.
                    # A property name matching regex `__.*__` is reserved.
                    # A reserved property name is forbidden in certain documented contexts.
                    # The name must not contain more than 500 characters.
                    # The name cannot be `""`.
                  "a_key": { # A message that can hold any of the supported value types and associated
                      # metadata.
                    "entityValue": # Object with schema name: Entity # An entity value.
                        #
                        # - May have no key.
                        # - May have a key with an incomplete key path.
                        # - May have a reserved/read-only key.
                    "timestampValue": "A String", # A timestamp value.
                        # When stored in the Datastore, precise only to microseconds;
                        # any additional precision is rounded down.
                    "geoPointValue": { # An object representing a latitude/longitude pair. This is expressed as a pair # A geo point value representing a point on the surface of Earth.
                        # of doubles representing degrees latitude and degrees longitude. Unless
                        # specified otherwise, this must conform to the
                        # WGS84
                        # standard. Values must be within normalized ranges.
                        #
                        # Example of normalization code in Python:
                        #
                        #     def NormalizeLongitude(longitude):
                        #       """Wraps decimal degrees longitude to [-180.0, 180.0]."""
                        #       q, r = divmod(longitude, 360.0)
                        #       if r > 180.0 or (r == 180.0 and q <= -1.0):
                        #         return r - 360.0
                        #       return r
                        #
                        #     def NormalizeLatLng(latitude, longitude):
                        #       """Wraps decimal degrees latitude and longitude to
                        #       [-90.0, 90.0] and [-180.0, 180.0], respectively."""
                        #       r = latitude % 360.0
                        #       if r <= 90.0:
                        #         return r, NormalizeLongitude(longitude)
                        #       elif r >= 270.0:
                        #         return r - 360, NormalizeLongitude(longitude)
                        #       else:
                        #         return 180 - r, NormalizeLongitude(longitude + 180.0)
                        #
                        #     assert 180.0 == NormalizeLongitude(180.0)
                        #     assert -180.0 == NormalizeLongitude(-180.0)
                        #     assert -179.0 == NormalizeLongitude(181.0)
                        #     assert (0.0, 0.0) == NormalizeLatLng(360.0, 0.0)
                        #     assert (0.0, 0.0) == NormalizeLatLng(-360.0, 0.0)
                        #     assert (85.0, 180.0) == NormalizeLatLng(95.0, 0.0)
                        #     assert (-85.0, -170.0) == NormalizeLatLng(-95.0, 10.0)
                        #     assert (90.0, 10.0) == NormalizeLatLng(90.0, 10.0)
                        #     assert (-90.0, -10.0) == NormalizeLatLng(-90.0, -10.0)
                        #     assert (0.0, -170.0) == NormalizeLatLng(-180.0, 10.0)
                        #     assert (0.0, -170.0) == NormalizeLatLng(180.0, 10.0)
                        #     assert (-90.0, 10.0) == NormalizeLatLng(270.0, 10.0)
                        #     assert (90.0, 10.0) == NormalizeLatLng(-270.0, 10.0)
                      "latitude": 3.14, # The latitude in degrees. It must be in the range [-90.0, +90.0].
                      "longitude": 3.14, # The longitude in degrees. It must be in the range [-180.0, +180.0].
                    },
                    "doubleValue": 3.14, # A double value.
                    "meaning": 42, # The `meaning` field should only be populated for backwards compatibility.
                    "excludeFromIndexes": True or False, # If the value should be excluded from all indexes including those defined
                        # explicitly.
                    "keyValue": { # A unique identifier for an entity. # A key value.
                        # If a key's partition ID or any of its path kinds or names are
                        # reserved/read-only, the key is reserved/read-only.
                        # A reserved/read-only key is forbidden in certain documented contexts.
                      "path": [ # The entity path.
                          # An entity path consists of one or more elements composed of a kind and a
                          # string or numerical identifier, which identify entities. The first
                          # element identifies a _root entity_, the second element identifies
                          # a _child_ of the root entity, the third element identifies a child of the
                          # second entity, and so forth. The entities identified by all prefixes of
                          # the path are called the element's _ancestors_.
                          #
                          # An entity path is always fully complete: *all* of the entity's ancestors
                          # are required to be in the path along with the entity identifier itself.
                          # The only exception is that in some documented cases, the identifier in the
                          # last path element (for the entity) itself may be omitted. For example,
                          # the last path element of the key of `Mutation.insert` may have no
                          # identifier.
                          #
                          # A path can never be empty, and a path can have at most 100 elements.
                        { # A (kind, ID/name) pair used to construct a key path.
                            #
                            # If either name or ID is set, the element is complete.
                            # If neither is set, the element is incomplete.
                          "kind": "A String", # The kind of the entity.
                              # A kind matching regex `__.*__` is reserved/read-only.
                              # A kind must not contain more than 1500 bytes when UTF-8 encoded.
                              # Cannot be `""`.
                          "id": "A String", # The auto-allocated ID of the entity.
                              # Never equal to zero. Values less than zero are discouraged and may not
                              # be supported in the future.
                          "name": "A String", # The name of the entity.
                              # A name matching regex `__.*__` is reserved/read-only.
                              # A name must not be more than 1500 bytes when UTF-8 encoded.
                              # Cannot be `""`.
                        },
                      ],
                      "partitionId": { # A partition ID identifies a grouping of entities. The grouping is always # Entities are partitioned into subsets, currently identified by a project
                          # ID and namespace ID.
                          # Queries are scoped to a single partition.
                          # by project and namespace, however the namespace ID may be empty.
                          #
                          # A partition ID contains several dimensions:
                          # project ID and namespace ID.
                          #
                          # Partition dimensions:
                          #
                          # - May be `""`.
                          # - Must be valid UTF-8 bytes.
                          # - Must have values that match regex `[A-Za-z\d\.\-_]{1,100}`
                          # If the value of any dimension matches regex `__.*__`, the partition is
                          # reserved/read-only.
                          # A reserved/read-only partition ID is forbidden in certain documented
                          # contexts.
                          #
                          # Foreign partition IDs (in which the project ID does
                          # not match the context project ID ) are discouraged.
                          # Reads and writes of foreign partition IDs may fail if the project is not in an active state.
                        "projectId": "A String", # The ID of the project to which the entities belong.
                        "namespaceId": "A String", # If not empty, the ID of the namespace to which the entities belong.
                      },
                    },
                    "stringValue": "A String", # A UTF-8 encoded string value.
                        # When `exclude_from_indexes` is false (it is indexed) , may have at most 1500 bytes.
                        # Otherwise, may be set to at least 1,000,000 bytes.
                    "blobValue": "A String", # A blob value.
                        # May have at most 1,000,000 bytes.
                        # When `exclude_from_indexes` is false, may have at most 1500 bytes.
                        # In JSON requests, must be base64-encoded.
                    "booleanValue": True or False, # A boolean value.
                    "arrayValue": { # An array value. # An array value.
                        # Cannot contain another array value.
                        # A `Value` instance that sets field `array_value` must not set fields
                        # `meaning` or `exclude_from_indexes`.
                      "values": [ # Values in the array.
                          # The order of this array may not be preserved if it contains a mix of
                          # indexed and unindexed values.
                        # Object with schema name: Value
                      ],
                    },
                    "integerValue": "A String", # An integer value.
                    "nullValue": "A String", # A null value.
                  },
                },
                "key": { # A unique identifier for an entity. # The entity's key.
                    #
                    # An entity must have a key, unless otherwise documented (for example,
                    # an entity in `Value.entity_value` may have no key).
                    # An entity's kind is its key path's last element's kind,
                    # or null if it has no key.
                    # If a key's partition ID or any of its path kinds or names are
                    # reserved/read-only, the key is reserved/read-only.
                    # A reserved/read-only key is forbidden in certain documented contexts.
                  "path": [ # The entity path.
                      # An entity path consists of one or more elements composed of a kind and a
                      # string or numerical identifier, which identify entities. The first
                      # element identifies a _root entity_, the second element identifies
                      # a _child_ of the root entity, the third element identifies a child of the
                      # second entity, and so forth. The entities identified by all prefixes of
                      # the path are called the element's _ancestors_.
                      #
                      # An entity path is always fully complete: *all* of the entity's ancestors
                      # are required to be in the path along with the entity identifier itself.
                      # The only exception is that in some documented cases, the identifier in the
                      # last path element (for the entity) itself may be omitted. For example,
                      # the last path element of the key of `Mutation.insert` may have no
                      # identifier.
                      #
                      # A path can never be empty, and a path can have at most 100 elements.
                    { # A (kind, ID/name) pair used to construct a key path.
                        #
                        # If either name or ID is set, the element is complete.
                        # If neither is set, the element is incomplete.
                      "kind": "A String", # The kind of the entity.
                          # A kind matching regex `__.*__` is reserved/read-only.
                          # A kind must not contain more than 1500 bytes when UTF-8 encoded.
                          # Cannot be `""`.
                      "id": "A String", # The auto-allocated ID of the entity.
                          # Never equal to zero. Values less than zero are discouraged and may not
                          # be supported in the future.
                      "name": "A String", # The name of the entity.
                          # A name matching regex `__.*__` is reserved/read-only.
                          # A name must not be more than 1500 bytes when UTF-8 encoded.
                          # Cannot be `""`.
                    },
                  ],
                  "partitionId": { # A partition ID identifies a grouping of entities. The grouping is always # Entities are partitioned into subsets, currently identified by a project
                      # ID and namespace ID.
                      # Queries are scoped to a single partition.
                      # by project and namespace, however the namespace ID may be empty.
                      #
                      # A partition ID contains several dimensions:
                      # project ID and namespace ID.
                      #
                      # Partition dimensions:
                      #
                      # - May be `""`.
                      # - Must be valid UTF-8 bytes.
                      # - Must have values that match regex `[A-Za-z\d\.\-_]{1,100}`
                      # If the value of any dimension matches regex `__.*__`, the partition is
                      # reserved/read-only.
                      # A reserved/read-only partition ID is forbidden in certain documented
                      # contexts.
                      #
                      # Foreign partition IDs (in which the project ID does
                      # not match the context project ID ) are discouraged.
                      # Reads and writes of foreign partition IDs may fail if the project is not in an active state.
                    "projectId": "A String", # The ID of the project to which the entities belong.
                    "namespaceId": "A String", # If not empty, the ID of the namespace to which the entities belong.
                  },
                },
              },
            },
          ],
          "skippedCursor": "A String", # A cursor that points to the position after the last skipped result.
              # Will be set when `skipped_results` != 0.
          "moreResults": "A String", # The state of the query after the current batch.
          "endCursor": "A String", # A cursor that points to the position after the last result in the batch.
        },
      }