Problem with GI and pygtk

[Thomas Martitz <kugel rockbox org>]

Hello,

my name is Thomas and I'm a computer scientist from Berlin, working in 
the embedded industry. In my spare time I work in the Geany IDE and Rockbox.

I'm struggling to make pygtk work with a library that provides gir 
bindings. I read that pygtk is based on pygobject and therefore I would 
expect that pygtk would work together with other GI libraries (perhaps 
in a limited fashion).

I attached my files for a reduced test scenario. test.c has a function 
that returns a GtkWidget. test.[ch] go into a shared library that is 
g-ir-scanned. test.py calls its function via gi. Since the function 
returns a GtkWidget this is where things break.

This is the error output (make everything, then run with 
GI_TYPELIB_PATH=$PWD python2 test.py):
/usr/lib/python2.7/site-packages/gobject/constants.py:24: Warning: 
g_boxed_type_register_static: assertion 'g_type_from_name (name) == 0' 
failed
   import gobject._gobject
Traceback (most recent call last):
   File "test.py", line 11, in <module>
     l = Test.label_new("Test Label")
   File "/usr/lib/python2.7/site-packages/gi/importer.py", line 68, in 
load_module
     dynamic_module._load()
   File "/usr/lib/python2.7/site-packages/gi/module.py", line 296, in _load
     self._overrides_module = importlib.import_module('gi.overrides.' + 
self._namespace)
   File "/usr/lib/python2.7/importlib/__init__.py", line 37, in 
import_module
     __import__(name)
   File "/usr/lib/python2.7/site-packages/gi/overrides/Gtk.py", line 
26, in <module>
     from gi.repository import GObject
   File "/usr/lib/python2.7/site-packages/gi/importer.py", line 68, in 
load_module
     dynamic_module._load()
   File "/usr/lib/python2.7/site-packages/gi/module.py", line 296, in _load
     self._overrides_module = importlib.import_module('gi.overrides.' + 
self._namespace)
   File "/usr/lib/python2.7/importlib/__init__.py", line 37, in 
import_module
     __import__(name)
   File "/usr/lib/python2.7/site-packages/gi/overrides/GObject.py", 
line 534, in <module>
     class Object(GObjectModule.Object):
   File "/usr/lib/python2.7/site-packages/gi/module.py", line 222, in 
__getattr__
     wrapper = metaclass(name, bases, dict_)
TypeError: metaclass conflict: the metaclass of a derived class must be 
a (non-strict) subclass of the metaclasses of all its bases


Perhaps I'm doing something wrong, or am I'm miserably misunderstanding 
pygtk/pygobject/gi. Can you assist me and lighten me up, please?

Best regards.

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