You are calling the wrong class name in your super() call:
class SimpleHelloWorld(IRCReplyModule):
def __init__(self):
#super(IRCReplyModule,self).__init__('hello world')
super(SimpleHelloWorld,self).__init__('hello world')
Essentially what you are resolving to is the __init__ of the object base class which takes no params.
Its a bit redundant, I know, to have to specify the class that you are already inside of, which is why in python3 you can just do: super().__init__()