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  1. class Stack:
  2. 	def __init__(self):
  3. 		self.__data = []
  4.  
  5. 	def empty(self):
  6. 		return len(self.__data) == 0
  7.  
  8. 	def size(self):
  9. 		return len(self.__data)
  10.  
  11. 	def push(self, x):
  12. 		self.__data.append(x)
  13.  
  14. 	def pop(self):
  15. 		return self.__data.pop()
  16.  
  17. stack = Stack()
  18. stack.push(10)
  19. stack.push(15)
  20. stack.push(20)
  21.  
  22. print(stack.empty())
  23. print(stack.size())
  24. print(stack.pop())
  25. print(stack.pop())
  26. print(stack.pop())
  27. print(stack.empty())
  28. print(stack.size())
Success #stdin #stdout 0.02s 9984KB
comments (?)
stdin
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Standard input is empty
stdout
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False
3
20
15
10
True
0
https://ideone.com/ntPWnt
language:
Python 3 (python  3.9.5)
created:
8 years ago
visibility:
public

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