Re: [Jython-users] ImportError: no module named java

[Robert W. B. <rb...@di...>]

On Mon, 22 Oct 2001, Ihab A.B. Awad wrote:
> Hi all,
>
> Thanks Robert Bill & Jim Adrig for the tips....
>
> > Yes, os requires the javaos module, and you get the ImportError when that
> > module cannot be Located. Fix= make sure module is found.
>
> I've been trying, in every manner possible! Here's my code --
>
>   rootPath = servletContext.getRealPath("/");
>   if (!rootPath.endsWith(File.separator)) rootPath += File.separator;
>
>   Properties p = getInitParametersAsProperties();
>   p.put(
>     "python.cachedir",
>     servletContext.getAttribute("javax.servlet.context.tempdir").toString());

Maybe try:
    p.put("python.home", "some/path/that/contains/jython's/Lib/dir")

Finding the cachedir will not help jython locate its modules, but finding
the correct python.home will.

>   PythonInterpreter.initialize(System.getProperties(), p, new String[0]);
>
>   PySystemState pySys = Py.getSystemState();
>   pySys.add_classdir(rootPath + "WEB-INF" + File.separator + "classes");
>   pySys.add_extdir(rootPath + "WEB-INF" + File.separator + "lib");
>   pySys.path.append(new PyString(servletContext.getAttribute("python.home") +
>     File.separator + "Lib"));

Maybe try printing python.home to make sure it isn't empty.  Actually,
printing python.home and sys.path is a good test.

>   pySys.path.append(new PyString(rootPath + "WEB-INF" + File.separator +
>    "py"));

Are the jython modules in WEB-INF/py/?  If javaos.py is there, I'm
stumped :(

>   pythonInterpreter = new PythonInterpreter(null, pySys);
>
> I think, based on looking at PyServlet.java, that this should get all my
> bases covered.

Print python.path and python.home to make sure they are correct.  That's
the easiest way to make sure bases are covered.  I would not trust
everything is covered until I got a confirmation that the sys.path
actually did include the directory that javaos.py lives in.

Best of luck.

-robert

> However, I still get --
>
>   import os
>   dir(os)
>
>   Traceback (innermost last): File "", line 10, in ? ImportError: no
>     module named javaos
>
>   import os
>   print os.listdir('/home/ihab')
>
>   Traceback (innermost last): File "", line 2, in ? AttributeError: class
>     'org.python.modules.os' has no attribute 'listdir'
>
> This is all very confusing. Any help appreciated from anyone. Peace,