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class Stack: |
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def __init__ (self): |
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self.items = list() |
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def push (self, item): |
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self.items.append (item) |
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def pop (self): |
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if len(self.items) > 0: |
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return self.items.pop() |
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return ('Stack is empty') |
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def isEmpty (self): |
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return self.items == list() |
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def size (self): |
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return len(self.items) |
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def peek (self): |
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return self.items[0] |
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def printStack (self): |
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print(self.items) |
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if __name__ == '__main__': |
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my_stack = Stack() |
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my_stack.push(1) |
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my_stack.printStack() |
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my_stack.push(5) |
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my_stack.push(3) |
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my_stack.printStack() |
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print('Pop {} from stack'.format(my_stack.pop())) |
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my_stack.printStack() |
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print('Now stack size is {}'.format(my_stack.size())) |
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print('First element in stack is {}'.format(my_stack.peek())) |
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print('Pop {} from stack'.format(my_stack.pop())) |
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my_stack.printStack() |
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print('Pop {} from stack'.format(my_stack.pop())) |
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my_stack.printStack() |
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print('Now stack size is {}'.format(my_stack.size())) |
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print(my_stack.pop()) |
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