class Stack: def __init__(self): self.arr = [-1,] def push(self, value): self.arr.append(value) def pop_value(self): if self.arr[-1] == -1: return "Fuck off empty stack" else: return self.arr.pop() def get_item(self): if self.arr[-1] != -1: return self.arr[-1] else: print "Empty stack" def show_stack(self): return self.arr[1:] def clear_stack(self): self.arr = []