Backported libraries for use in Ignition's Jython 2.5 environment

To use simply copy the contents of the pylib folder to your Ignition's installation under ./user-lib./pylib. For example, by default this will be C:\Program Files\Inductive Automation\Ignition\user-lib\pylib

Jython 2.5 is similar to - but not quite - Python 2.5. For example, there is no GIL and it has Unicode support. It also has some mechanical differences with Python 2.7, subtle things like different exception handling syntax, different underlying types, and missing/incomplete builtins (many added in Python 2.6).

When a core library from Python 2.7 is needed but not implemented in Jython 2.5, we can often directly reimplement the functionality from PyPy. The source code provides a full (and often performant!) implementation of Python in Python itself! That means that just about any function can be ported and made to work into Jython. Usually I search in the [pypy]./lib-python/2.7/.

A few techniques are used:

• Find/replace to enumerate the code that needs changing.
• Libraries backported from Python 2.7 via PyPy.
• Monkey patching incorrect or incomplete functions.
• Rename, redirect, and wrap incompatible functions.

Please submit a pull request or open an issue for direction on something to add!