Re: [Jython-users] painful transition from jpython to jython

[<bc...@wo...>]

[Robert Kuzelj]

>i am just now moving from jpython to jython and
>i am experiencing some errors by doing that.
>maybe somebody can help.
>
>here the context:
>i am writing some modules, that help to
>generate java-code from a togetherj-modell.
>so what i am doing in effect is calling a
>java-module from together which again calls
>thru the PythonInterpreter my python-modules.
>
>on switching to jython20 i have renamed
>my old jpython installation directory to 
>jpython.old and installed jython. i renamed
>my new jython install-directory to jpython 
>and renamed the jython.jar to jpython.jar.
>this was all done so that there be no need
>to change all the property-files for running
>my generator scripts.
>
>after switching to jython the os module can not
>be called anymore. i simply can not understand
>why this happens.

It is a bug in Jython-2.0. The javaos.java class expect sys.prefix to
have a value. This may not be the case when running embedded or
jythonc'ed. The bug is fixed in the current CVS. As a work around you
can assign a value to sys.prefix before the "os" module gets imported.

  import sys; sys.prefix = '.'
  ...

regards,
finn