Mega Code Archive

 

Categories / Python / Class

 

Inherited method

class FirstClass:                      def setdata(self, value):             self.data = value        # self is the instance      def display(self):          print self.data          # self.data: per instance class SecondClass(FirstClass):                     # inherits setdata      def display(self):                            # changes display           print 'Current value = "%s"' % self.data class ThirdClass(SecondClass):                       def __init__(self, value):                          self.data = value      def __add__(self, other):                 # on "self + other"          return ThirdClass(self.data + other)      def __mul__(self, other):          self.data = self.data * other         # on "self * other"  a = ThirdClass("abc")     # new __init__ called a.display()               # inherited method b = a + 'xyz'             # new __add__: makes a new instance b.display() a * 3                     # new __mul__: changes instance in-place a.display()