On Monday 05 May 2003 08:59, Cherney John-CJC030 wrote:
>  I have an interpreter embedded in my java program, and I set the
>  attributes, import the proper modules, and execute the right jython method
>  in the imported script. But I want to reuse that interpreter, setting other
>  attributes, doing other imports, etc. Is there a way I can set it back to
>  some initial state, without having to re-instantiate it? I don't want
>  something I'm executing to have unusual side effects because of something
>  that I imported earlier in the program. Or, worse, have a pool of embedded
>  interpreters where one of them intermittently acts funny because of the
>  combination of scripts it ran over its lifetime. I was looking at the

How much isolation do you want between the interpreted scripts?

>  javadoc for org.python.util.PythonInterpreter and it looks like cleanup or
>  initialize are along the lines of what I want, but cleanup doesn't have any
>  documentation, and initialize can only be called once, and prior to
>  creating a PythonInterpreter. Are there other options?

The cleanup is not documented because it is not part of the python language.

You have full control over the environment in which your scripts run. You can:
- get full isolation between scripts by using a separate class loader and a 
new jython system object for each script.
- combine a thread and an interpreter to run scripts after each other,
  evt. clearing the global namespace between scripts. This lets the
  scripts share the jython system state, mostly the imported modules.
  You can clear the modules loaded into sys.modules between scripts.
  This gets tricky when your scripts change the built in namespace.
- use a new system state for each interpreter.
- let scripts run concurrently on the same global namespace (not recommended).

See http://www.python.org/doc/current/ref/naming.html to determine
what you want to control.

Kind regards,
Ype



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