在学习python的过程中，用来练习代码，并且复习数据结构的

#coding:utf-8#author:Elvis class Stack(object): def __init__(self, size=8): self.stack = [] self.size = size self.top = -1 def is_empty(self): if self.top == -1: return True else: return False def is_full(self): if self.top +1 == self.size: return True else: return False def push(self, data): if self.is_full(): raise Exception('stackOverFlow') else: self.top += 1 self.stack.append(data) def stack_pop(self): if self.is_empty(): raise Exception('stackIsEmpty') else: self.top -= 1 return self.stack.pop() def stack_top(self): if self.is_empty(): raise Exception('stackIsEmpty') else: return self.stack[self.top] def show(self): print self.stack stack = Stack()stack.push(1)stack.push(2)stack.push('a')stack.push('b')stack.push(5)stack.push(6)stack.stack_pop()stack.stack_pop()stack.stack_top()stack.is_empty()stack.is_full()stack.show()

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