On 2007-05-09, [EMAIL PROTECTED] <[EMAIL PROTECTED]> wrote: > I'm trying to solve a problem using inheritance and > polymorphism in python 2.4.2
It's not an inheritance problem, it's a notation problem. Python uses explicit 'self', saving you the trouble of devising a naming convention for data members. > I think it's easier to explain the problem using simple example: > > class shortList: > def __init__(self): > self.setList() > > def setList(self): > a = [1,2,3] > print a You need to use self.a = [1, 2, 3] print self.a The notation you used creates a local variable, but you need a data member. > class longList(shortList): > def __init__(self): > shortList.setList() > self.setList() > > def setList(self): > a.extend([4,5,6]) > print a Similarly: self.a.extend([4, 5, 6]) print self.a Does that give you better results? -- Neil Cerutti If we stay free of injuries, we'll be in contention to be a healthy team. --Chris Morris -- http://mail.python.org/mailman/listinfo/python-list