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

[Jeff E. <jem...@fr...>]

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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>>>
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