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

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

Thanks a lot Jeff. That worked.!!

Balaji

On 9/18/07, Jeff Emanuel <jem...@fr...> wrote:
>
> import org.python.core.imp;
> import org.python.core.PyModule;
>
> Balaji Srinivasan wrote:
> > 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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