JPython?

[Dan Star]

Thanks for the clarification.

--Dan


"Barry A. Warsaw" wrote:
> 
> >>>>> "DS" == Dan Star <danstar at execpc.com> writes:
> 
>     DS> Let me see if I am understanding what JPython is.  Is it a
>     DS> just-in-time compiler that translates python code to java
>     DS> byte-code so that the python code can run in a WEB browser
>     DS> that supports java?
> 
> Sort of.  Yes, part of what it does is translate Python source code to
> Java bytecode, dynamically loading said bytecode into your JVM, and
> executing it.  It isn't limited to a browser, and in fact works well
> with most 1.1 and 1.2 JVMs (modulo your favorite JIT bugs).
> 
>     DS> If so, I would assume this places many restricitions on the
>     DS> Python language elements you can use.
> 
> Actually it doesn't.  I think it's a testament to JimH that JPython
> implements very nearly the same language spec that CPython does.  For
> a mostly up-to-date comparison, please see
> 
>     http://www.jpython.org/docs/differences.html
> 
> Most of these are IMO mostly below the radar of the average Python
> hacker.  The most significant difference is in the libraries.
> Anything that's written in pure Python should work the same in both
> implementations.  CPython of course has a host of built-in modules
> implemented in C.  Some of these have been ported to Java and are
> available in JPython, but not all (contributions welcome!).  Of course
> JPython has access to the vast array of Java libraries, which CPython
> does not.
> 
>     DS> Or is JPython a seperate implementation of Python with its own
>     DS> language set?
> 
> JPython is a completely separate implementation, but it should feel
> very natural to any Python programmer.  It is interesting how this
> second implementation helps to delineate exactly what is part of
> the Python language definition, and what are implementation details.
> 
> Hope that helps,
> -Barry