I need to move an existing Jython 2.5.1 code-base onto 2.7.3.1-SNAPSHOT with ODI Studio 14 without altering the way the application behaves. There are no custom libraries or exotic C-extensions involved, so the task is almost entirely about updating syntax, resolving standard-library changes, and making sure the bridge to the JVM still works exactly as it does today. Core functionality must remain identical. I already have a small suite of regression tests, but coverage is thin, so you will probably rely on manual checks and your own added tests to prove nothing broke. When you are done I expect: • the project to run under Jython 2.7.3.1-SNAPSHOT with ODI Studio 14 and https://www.tutorialspoint.com/compilers/online-jython-compiler.htm • all existing tests (plus any you add) to pass • a concise migration report noting every code change, deprecated API you replaced, and any future compatibility concerns If you are comfortable refactoring Python 2.x syntax, juggling Java classpaths, and writing quick unit tests with `unittest` or `pytest`, this should be straightforward work.