Re: [Jython-users] Eclipse + Jython = Call Python from Java does not work

[Philipp Z. <ze...@gm...>]

On 11/08/2011 10:48 PM, Pierre Thibault wrote:
> 2011/11/8 Philipp Zech <ze...@gm... <mailto:ze...@gm...>>
>
>     so now, if trying to get an instance of a python class via the object
>     factory, as done according to the above mentioned book, i get the
>     error
>     that one of my modules, namely building (building.py) is not found,
>     however the package itself (base) is found. I kinda assume this is due
>     to the java interface implemented by the python class and that
>     it's not
>     found, however, up to now, i couldn't figure a way out on how to
>     resolve
>     this issue. Maybe someone can give me a hint on what I'm doing wrong.
>     Any help will be appreciated!
>     Thanks in advance!
>
>     Cheers,
>
>     Philipp
>
>
> As I see, are you importing "building"? I think you need to import 
> "from base import building". building is inside the package base.
>
> -------------
>
> Pierre Thibault
>
> Python Developer/Développeur Python
> Montréal, QC
> /pie...@gm... <mailto:pie...@gm...>/
>
>
>
>
>
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Hi Pierre,

thanks for your answer, however, there should be anything wrong with my 
importing statements (see below):


         public JythonObjectFactory (Class<?> interfaceType, String 
moduleName, String className)
         {
             this.interfaceType = interfaceType;
             final PyObject importer = 
state.builtins.__getitem__(Py.newString("__import__"));
             final PyObject module = 
importer.__call__(Py.newString(moduleName));
             clazz = module.__getattr__(className);sepp
         }


so the above method is ued to get the module and based on it get an 
instancen of the pythonclass Building (defined inside building .py). In 
the main method of this small program i create a buildiongFactory and 
try to get an isntance of building via the following code:


         JythonObjectFactory buildingFactory = new 
JythonObjectFactory(BuildingType.class, "base.building", "Building");
         BuildingType building = (BuildingType) 
buildingFactory.createObject();


as can be seen from those two code excerpts, i actually try to import 
the module "building" from the package "base", however, no success so 
far. Interestingly, if I start to mess around with the package name, 
i.e.: replacing it by "foo", the python interpreter claims that this 
very module named "foo" cannot be found, which is true, as it is 
non-existent (see below):

         JythonObjectFactory buildingFactory = new 
JythonObjectFactory(BuildingType.class, "foo.building", "Building");

leads to

         Exception in thread "main" Traceback (innermost last):
           (no code object) at line 0
         ImportError: no module named foo

yet, changing the package name back to "base" leads to the previous error:

         Exception in thread "main" Traceback (innermost last):
           (no code object) at line 0
         ImportError: No module named building

This kinda looks like the package can be found, yet the module cannot be 
created, yet I have no clue why this happens...again, maybe someone out 
there can give me the needed hint!

thanks again in advance!


philipp