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46 lines
962 B
46 lines
962 B
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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