学步园

>>> class testsetandget:<br /> kk = {};<br /> def __getitem__(self, key):<br /> return self.kk[key];<br /> def __setitem__(self, key, value):<br /> self.kk[key] = value;</p> <p>>>> a = testsetandget()<br /> >>> a['first'] = 1<br /> >>> a['first']<br /> 1<br /> >>> a.__setitem__('second', 2)<br /> >>> a.__getitem__('second')<br /> 2<br /> >>> a['second']<br /> 2<br /> >>>