Python类的__getitem__和__setitem__特殊方法

class testsetandget:

    kk = {};

    def __getitem__(self, key):

        return

self.kk[key];  

    def __setitem__(self,

key, value):  

self.kk[key] = value;

a = testsetandget()

a[‘first‘] =

1

print a[‘first‘]

a.__setitem__(‘second‘, 2)

print

a.__getitem__(‘second‘)

print a[‘second‘]

输出：

2