Python Lists as Stacks
>>> stack = [11,22,33,44,55,66,77]
>>> stack.append(88)
>>> stack
[11, 22, 33, 44, 55, 66, 77, 88]
>>> stack.append(99)
>>> stack
[11, 22, 33, 44, 55, 66, 77, 88, 99]
>>> stack.pop()
99
>>> stack.pop()
88
>>> stack.pop()
77
>>> stack.pop()
66
>>> stack
[11, 22, 33, 44, 55]