Re: [Jython-users] Diagram of Jython operation

[D-Man <ds...@ri...>]

On Wed, Feb 07, 2001 at 04:03:36PM -0700, Mats Wichmann wrote:
| At 02:01 PM 02/07/2001 -0500, D-Man wrote:
| 
| Thanks.  I believe it will help a bit... but I'm still in need

You're welcome.

| of producing a diagram and I guess the rule is that if you
| REALLY understand it yourself that is not so hard.  Sigh.
| 
|  >In the simplest view, Jython is just a Java library written in Java<br>
|  >that runs in a JVM.
| 
| Yes, this is what my first-cut Jython picture shows... a class file
| (Jython) that runs in the JVM and calls on "standard" Java classes.
| What I hadn't worked out how to pictorially include was what happens
| when it's run as an interpreter...or what it would look like when
| Python modules are imported and called.
| 

How do you have these Python modules?  If you compiled them with
jythonc --all --jar  then they are java bytecodes in a jar file right
next to the jython implementation's bytecodes.  You would just need to
include that jar in the classpath.  This is good for distributing your
code -- your users don't have to know anything except to have the jar
in the classpath.

If your Python modules are simply in *.py files, then you must include
the directory they are in in the PYTHONPATH system property.  I
haven't dealt with this yet.  If the python code is in the current
directory you won't have any trouble.  ex:

$ jython ./myscript.py


If you are embedding the interpreter in a java app, then it is up to
you to find the python code (that your users have written) and feed it
to the interpreter.

-D