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!
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class Stackx(list):
def push(self,x):
indx= super.len(x)
self.insert(my_len+1,x)
def pop(self):
return self[-1]
def test():
myStack = Stackx([1, 2 ,3 ,4])
print myStack
myStack.push(9)
print myStack
print myStack.pop()
if __name__=='__main__':
test()
'''
Traceback (most recent call last):
File "C:\Python25\Stack2.py", line 20, in <module>
test()
File "C:\Python25\Stack2.py", line 14, in test
myStack.push(9)
File "C:\Python25\Stack2.py", line 4, in push
indx= super.len(x)
AttributeError: type object 'super' has no attribute 'len'
'''
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