python之函數用法__getitem__()

# -*- coding: utf-8 -*-
#python 27
#xiaodeng
#python之函數用法__getitem__()
#http://www.cnblogs.com/hongfei/p/3858256.html


#__getitem__
#如果類把某個屬性定義為序列，可以使用__getitem__()輸出序列屬性中的某個元素.
class FruitShop():
     def __getitem__(self,i):
         return self.fruits[i]#可迭代對象   


if __name__ == "__main__":
    shop = FruitShop()
    print shop                              #__main__.FruitShop instance
    shop.fruits = ["apple", "banana"]
    print shop[1]                           #banana
    for item in shop:
        print item