python中__getitem__, __setitem__, __delitem__的使用

參考： 伯樂地址

用於索引操作，如字典。以上分別表示擷取、設定、刪除資料

#Python __doc__class C(object):    """ Holy Shit What The Fuck """    def __init__(self):        self.value = {}        self.name = 'WuPeiQi'    def __getitem__(self, item):        print '__getitem__', item        return self.value[item]    def __setitem__(self, key, value):        print '__setitem__', key, value        self.value[key] = value    def __delitem__(self, key):        print '__delitem__', key        del self.value[key]    def __len__(self):        return len(self.value)print C.__doc__c = C()#print c#result = c['k1']c['k2'] = 5c['k1'] = "Hello"print c['k2']print len(c)