python数据结构之栈的构建

class Stack(object):

    def __init__(self):
        self.stack=[]

    def pop(self):
        return self.stack.pop()

    def push(self,item):
        return self.stack.append(item)

    def isempity(self):
        if len(self.stack)==0:
            return True
        else:
            return False
    def size(self):
        return len(self.stack)

    def get_stack(self):
        return self.stack

if __name__ == '__main__':
    pass