Migrating from CPython to Jython

Question

I\'m considering moving my code (around 30K LOC) from CPython to Jython, so that I could have better integration with my java code.

Is there a checklist or a guide

Answer 1

So far, I have noticed two further issues:

• String interning 'a' is 'a' is not guaranteed (and it is just an implementation fluke on CPython). This could be a serious problem, and really was in one of the libraries I was porting (Jinja2). Unit tests are (as always) your best friends!

Jython 2.5b0 (trunk:5540, Oct 31 2008, 13:55:41)
>>> 'a' is 'a'
True
>>> s = 'a'
>>> 'a' is s
False
>>> 'a' == s   
True
>>> intern('a') is intern(s)
True

Here is the same session on CPython:

Python 2.5.2 (r252:60911, Oct  5 2008, 19:24:49)
>>> 'a' is 'a'
True
>>> s = 'a'
>>> 'a' is s
True
>>> 'a' == s
True
>>> intern('a') is intern(s)
True

• os.spawn* functions are not implemented. Instead use subprocess.call. I was surprised really, as the implementation using subprocess.call would be easy, and I am sure they will accept patches.

(I have been doing a similar thing as you, porting an app recently)