> I am trying to extend list class to build a stack class -- see code below--- > but I got an error when I try to call len method from list class here.. why? > Thanks in advance!
Jeff did a good job of answering your questions. I just wanted to note that your pop is broken, but that doesn't matter since list already has a pop method that will do what you want. Actually it has a push method that does what you want too, it is called `append'. If you really want a push method, you could just do this: [code] >>> class Stack(list): ... push = list.append >>> s = Stack() >>> s.push(1) >>> s.push(2) >>> s.push(3) >>> s.pop() 3 >>> s.pop() 2 >>> s.pop() 1 [/code] Matt -- http://mail.python.org/mailman/listinfo/python-list
