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I'm looking at how to use NSNotificationCenter (which is needed for things like external gamecontrollers) and I have no idea how to make it work. I tried quite a bit but now I'm stuck with this little code:

from objc_util import *

Notification_Center = ObjCClass('NSNotificationCenter').defaultCenter()

def test(arg):
    print 'Received notification!'      

class test_c():
    pass

Notification_Center.addObserver_selector_name_object_(test_c,test,'moetest',None)
Notification_Center.postNotificationName_object_('moetest',self)

It throws a wrong argument type exception.

You need to create an actual Objective-C class to receive notifications. The latest beta (#160023) makes this a bit easier with the create_objc_class function. Here's a simple example:

from objc_util import *

center = ObjCClass('NSNotificationCenter').defaultCenter()

def test_(_self, _cmd, n):
    # note: the trailing underscore in the method name is important.
    notification = ObjCInstance(n)
    print 'Received notification: %s' % notification

MoeObserver = create_objc_class('MoeObserver', methods=[test_])
observer = MoeObserver.alloc().init()

center.addObserver_selector_name_object_(observer, 'test:', 'moetest', None)
center.postNotificationName_object_('moetest', None)

Thank you very much! Worked just fine (except for the string formatting in test_, for whatever reason) :D

Is the Notification module not appropriate for the current project?

NSNotificationCenter isnt not related at all to the UI-Notification-Center. NSNotificationCenter is some kind of async messaging system. You can register a function to be called when a certain message is sent in your program, somewhat similar to a delegate.

Thanks for the info.