simple event system

myeventsystem.py

event_handlers = {}

def registerEventHandler(event_name, handler):
    if not event_name in event_handlers.keys():
        event_handlers[event_name] = []
    event_handlers[event_name].append(handler)

class eventHandler(object):
    '''Decorator which registers a function as an event handler.'''
    def __init__(self, name):
        self.name = name
    def __call__(self, f):
        self.__doc__ = f.__doc__
        self.__name__ = f.__name__
        registerEventHandler(self.name, f)
        return f
        
def triggerEvent(event_name, *args, **kwargs):
    if event_name in event_handlers.keys():
        for handler in event_handlers[event_name]:
            handler(*args, **kwargs)
        
@eventHandler("myeventname")
def myEventHandler(my_arg1, my_arg2):
    print "got myeventname1", my_arg1, my_arg2
    
triggerEvent("myeventname", "my arg 1", "my arg 2")

@eventHandler("myeventname")
def myEventHandler(my_arg1, my_arg2):
    print "got myeventname2", my_arg1, my_arg2

triggerEvent("myeventname", "my arg 3", "my arg 4")