# This *FAILS* with AttributeError: 'FancyPublisher'
# object has no attribute 'listeners'
class FancyPublisher(threading.Thread, Publisher):
def __init__(self):
super(FancyPublisher, self).__init__()
F = FancyPublisher()
F.register('me', None)
-------------------
The problem is that super appears to only work with single inheritance.
There may be a way to makle it work for multiple inheritance by changing
the second parameter but the documentration is a bit thin!!
For that reason I tend not to use super but instead prefer the classical
method of explicit call:
class FancyPublisher(threading.Thread, Publisher):
def __init__(self):
Publisher.__init__(self)
That way its clear which superclass is being called and I can call
all of the superclasses in whichever order I want.
Hopefully someone can explain how to use super properly to
do this, but it beats me! (This is why super() doesn't appear in
the OOP topic in my tutor, I found it more confusing than
helpful for a beginner - and even for me!)
Alan G
_______________________________________________
Tutor maillist - Tutor@python.org
http://mail.python.org/mailman/listinfo/tutor
