Re: [Jython-users] Difference between using the jython program and using the python interpreter from Java (__main__ vs main)

[Balaji S. <bal...@gm...>]

Thanks Jeff. But what is imp?
I tried interp.addModule and that doesnt compile.Thanks
Balaji

On 9/18/07, Jeff Emanuel <jem...@fr...> wrote:
>
> Add this after creating your interpreter:
>
>            PyModule mod = imp.addModule("__main__");
>            interp.setLocals(mod.__dict__);
>
>
> Balaji Srinivasan wrote:
> > Hi EveryoneI found a difference between the way jython works when it is
> > called from the command line and when it is called from a java program.
> Ive
> > tried my best to explain it and get a workaround but all attempts have
> > failed. I will appreciate any help.
> >
> >
> > What I want to do is given a script string I want to find all the
> functions
> > defined in the script.
> > Lets say the script fragment is as follows:
> > def foobar():
> >     print("foobar")
> >
> >
> > If I try this via the jython program, I get the following:
> >
> >
> > bash$ jython
> > Jython 2.2 on java1.5.0_11
> > Type "copyright", "credits" or "license" for more information.
> >>>> def foobar():
> > ...     print("foobar")
> > ...
> >>>> this_module = __import__(__name__)
> > *>>> print __name__*
> > *__main__*
> >>>> for e in dir():
> > ...     if (callable(getattr(this_module, e))):
> > ...         print(e + " is callable")
> > ...
> > *foobar is callable*
> >
> >
> > Notice that the __name__ shows up as __main__ and that foobar shows up
> as
> > callable. So far so good.
> >
> >
> > Now if I try to do the same thing via java:
> >
> >
> > bash$ java Test2
> > Traceback (innermost last):
> >   File "<string>", line 4, in ?
> > *ImportError: no module named main*
> > *Name was main*
> > *
> > *
> > Now why is the __name__ set to main? I even tried hardcoding the
> __import__
> > to call __import__('__main__'). It couldnt find that module either.
> > Any ideas on how I can get this to work? Any help would be greatly
> > appreciated.
> >
> >
> > Here is the java code:
> > import org.python.util.PythonInterpreter ;
> > import org.python.core.*;
> >
> >
> > public class Test2 {
> >
> >
> >         public static void main(String[] args) throws Exception {
> >                 PythonInterpreter interp = new PythonInterpreter();
> >                 interp.setErr(System.err);
> >                 interp.setOut(System.out);
> >                 String s = "def foobar():\n" +
> >                            "    print(\"foobar\")\n" +
> >                            "name=__name__\n" +
> >                            "this_module = __import__(__name__)\n" +
> >                            "for e in dir():\n" +
> >                            "    if (callable(getattr(this_module,
> e))):\n" +
> >                            "        print(e + \" is callable\")\n";
> >
> >
> >                 try {
> >                         interp.exec(s);
> >                 } catch (PyException e) {
> >                         e.printStackTrace ();
> >                 }
> >                 System.out.println("Name was " + interp.get("name"));
> >         }
> > }
> >
> >
> > Thanks a lot in advance and apologies if I missed an FAQ that covers
> this. I
> > did try to do my research before posting this.
> > Thanks
> > Balaji
> >
> >
> >
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