Python class Four: Inheritance of classes and overriding of parent class methods

Python inherits that subclasses can override various methods of the parent class, including the __init__ method.

If you want to overwrite the __init__ method of the parent class, and you want to refer to the __init__ method of the parent class in the overridden method, such as adding some properties to the __init__ method of the parent class or something else.

You need to display a method that references the parent class, otherwise the parent class's methods are not called directly to.

Like what:

#coding: utf-8# C Inherits P and implements its own __init__ method, that is, to re-implement the __init__ method, but in order to reduce the code redundancy # C in its own __init__ method refers to the __init__ method of P,  This method needs to display the call p, and to pass the self variable to P's # __init__ method class P (object): Def __init__ (self,nm): Self.name = Nmclass C (p): def __init__ (Self,nm,idnum): p.__init__ (self,nm) self.id = IDNUMC1 = C (' John ', one) print C1print c1.name,c1.id

The operating result is:

[Email protected] eg_4]# python2.7 class_inherit_demo_4.py<__main__.c object at 0x7efdf2ff6a90>john 11

Python class Four: Inheritance of classes and overriding of parent class methods