Differences - Python & Jython

Python

• C
• Multi-platform
• Compiles to .pyc
• Extend with C
• GIL
• Python Garbage Collection

Jython

• 100% Java
• Any JVM (currently 1.1+)
• Compiles to .class
• Extend with Java
• Truly multi-threaded
• Java garbage collection

General Bits

• __del__ is not reliable because the Java garbage collector is used
• Java only has Unicode strings
• Cannot mix Python and Java classes in multiple inheritance
• Java instances cannot have dynamic attributes
• Boolean type difficult to address:
  public void do(int i);
  public void do(boolean b);

• Jython changes with two fronts:
  Keeping up with CPython language changes
  new-style classes
  list comprehensions
  generators
  Keeping up with Java language changes
  enum
  auto-boxing
  vargs
  generics (not necessary in Python)
  annotations
  StackTraceElement