[Jython-users] Interpreters within Interpreters

[Edward P. <epo...@te...>]

Hello All,

My Jython app creates and uses a few org.python.util.PythonInterpreter's. It
looks something like this:


|-----Shared namespace ------------|
Main app
Interpreter Interpreter Interpreter

So the interpreters and the main app share a namespace.

Can anyone answer these questions:

o If a script executed within one interpreter alters the state of the main
application (ie, a scripted class is added to some application list), and
the interpreter is deleted, what happens.
Is the interpreter really deleted, or is some reference going to be dangling
about.
If it is deleted, is the scripted class 'ok', or will weird and unpleasant
things happen.

o Each interpreter redefines sys.stderr. It seems that stderr is unique
amongst all interpreters within an app. Is there another way to deal with
this? I redefined both sys.stderr via interpreter.exec() calls, and
interpreter.setOut() ... same result. I can think of hacky ways to deal with
this, but there might be an easy solution out there.

o Anything else I should be aware of. From some stuff in the archive, I see
only one person saying that they had problems when interpreters were in diff
threads. But no solutions.

Sorry if these are basic questions, I have been only using Jython for about
2 months, but am having such a blast that it is my main dev language now.

Thanks,
-Ed