子类继承父类后想要扩展父类方法

>>> class PClass(object):
    def setInfo(self,sex='Male'):
        self.gender = sex

        
>>> class CClass(PClass):
    def setInfo(self,who):
        self.name = who
        PClass.setInfo(self)＃子类继承父类后想要扩展父类方法，若仍想保留父类方法可以通过回调

        
>>> x = CClass()
>>> x.setInfo('Tom')
>>> x.name
'Tom'
>>> x.gender
'Male'