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Jython is an implementation of the high-level, dynamic, object-oriented language Python written in 100% Pure Java, and seamlessly integrated with the Java platform. It thus allows you to run Python on any Java platform.

The newest version!

Derived classes (classes that allow for user extension) are created as follows:

1. Create a template file xxx.derived
2. Modify mappings, which associates a template with a specific class in
   the source tree to be generated
3. Run (with CPython) gderived.py against the the template file

Example: creating a derivable version of int

from the file int.derived:

  base_class: PyInteger
  want_dict: true
  ctr: int v
  incl: object

from mappings, the relevant entry (please keep sorted):

  int.derived:org.python.core.PyIntegerDerived

To generate the source of the class, src/org/python/core/PyInteger.java:

  python gderived.py int.derived