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  1. class Stack:
  2.     def __init__(self):
  3.         self.values = []
  4.     def push(self, item):
  5.         self.values.append(item)
  6.     def pop(self):
  7.         if not self.values:
  8.             print("Empty Stack")
  9.             return None
  10.         return self.values.pop()
  11.     def peek(self):
  12.         if not self.values:
  13.             print("Empty Stack")
  14.             return None
  15.         return self.values[-1]
  16.     def is_empty(self):
  17.         return not self.values
  18.     def size(self):
  19.         return len(self.values)
  20.  
  21. """
  22.  
  23. class Stack:
  24.     def __init__(self):
  25.         self.values = []
  26.     def push(self, item):
  27.         self.values.append(item)
  28.     def pop(self):
  29.         if len(self.values) == 0:
  30.             print("Empty Stack")
  31.             return None
  32.         return self.values.pop()
  33.     def peek(self):
  34.         if len(self.values) == 0:
  35.             print("Empty Stack")
  36.             return None
  37.         return self.values[-1]
  38.     def is_empty(self):
  39.         return len(self.values) == 0
  40.     def size(self):
  41.         return len(self.values)
  42.  
  43. """
Success #stdin #stdout 0.04s 63740KB
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https://ideone.com/ob91Uf
language:
Python (PyPy 2.7.13)
created:
3 years ago
visibility:
secret

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