The latest jython.jar is really big, so, the Jython included in PyDev was stripped out to include less things.

Below is the process which should be done to upgrade to a newer jar.

1. Get the latest jython.jar from the homepage and copy it to a folder:

(i.e.: X:\jython\dist\testing\original.jar)

1.a. Delete icu from the original.jar (org.python.icu)

2. Get proguard and copy it too:

(i.e.: X:\jython\dist\testing\proguard5.0)

3. Put jython.pro in the same folder of the original.jar

(i.e.: X:\jython\dist\testing\jython.pro)

4. Run proguard:

cdd X:\jython\dist\testing\
c:\bin\jdk1.7.0_55\bin\java.exe -jar proguard5.0\lib\proguard.jar @jython.pro > out.txt

5. Check with the latest pep8 (also with JythonTest and check if existing scripts work properly in PyDev)
cdd X:\pep8
c:\bin\jdk1.7.0_55\bin\java.exe -jar X:\jython\dist\testing\jython.jar pep8.py --testsuite testsuite

c:\bin\jdk1.7.0_55\bin\java.exe -jar X:\jython\dist\testing\jython.jar pep8.py --doctest

c:\bin\jdk1.7.0_55\bin\java.exe -jar X:\jython\dist\testing\jython.jar pep8.py --verbose pep8.py
