Python的类继承，Python类继承,class FirstC

Python的类继承，Python类继承,class FirstC

class FirstClass:                 # define a class object     def setdata(self, value):    # define class methods         self.data = value        # self is the instance     def display(self):         print self.data          # self.data: per instanceclass SecondClass(FirstClass):                     # inherits setdata     def display(self):                            # changes display          print 'Current value = '%s'' % self.dataz = SecondClass()z.setdata(42)           # setdata found in FirstClassz.display()             # finds overridden method in SecondClass