Re: [Jython-users] Can we use Jython with just the jython.jar file?

[Marty S. <ms...@qu...>]

I embed the jython engine within a servlet application.

Within the jython distribution tree, I found a subdirectory by the
name of "Lib", which is full of .py files representing the standard
library.

I arrange for this tree to be installed within "/foo/jythonLib", and
then use code like this to init the jython engine:

    Properties p = new Properties();
    p.setProperty("python.path", "/foo/jythonLib");
    PythonInterpreter.initialize(System.getProperties(), p, null);

So, the files I ship with my application are the jython.jar file, plus
that tree.


As far as making this tree of files available to an applet, sorry, I
haven't been there.  I know that when this tree of files has been
installed, and I start executing jython script against the engine, for
each .py file that is referenced, an associated .class file is
generated.  Therefore, I think you'd have to use the applet trick of
causing a .jar file's contents to be expanded into a local spot on the
user's hard drive.  This, I believe, requires a digitally signed .jar
file.




On Tue, 2 Apr 2002, Mark Elston wrote:

> I sent this message last week but got no responses so I am
> trying it again.
> 
> We are in the process of writing a Java application to control a
> piece of test equipment.  Our architecture allows us to extend
> this application via a scripting language.  Jython seems the 
> perfect choice for this.
> 
> However, we will not be able to require all our customers to 
> install Jython on their systems.  We were planning to distribute
> the jython.jar file (plus any other jar files necessary).
> 
> This has apparently caused a problem.  
> 
> When testing on a platform without installing Jython or CPython
> if we have a script that imports string, re or most any other
> module, we get an import error.  This does not happen on my
> machine (which has both ActivePython and Jython installed).
> 
> I tried to fix this by running jythonc on all the standard lib
> files in the jython\lib directory and creating a jar file out
> of the resulting class files and putting this jar file in the 
> classpath of the command running our app.  We still get import
> errors in importing these modules.
> 
> So, how do we provide the standard library modules to an embedded
> interpreter running on a machine where Jython has not been installed?
> 
> A similar question would be how do we provide these modules to an
> applet running remotely on a web browser?
> 
> Mark
> 
> 
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-- 
Martin Stitt
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QUIQ, Inc
Powering The Customer-To-Customer Service Revolution