Python subclass methods for calling parent class members

1. Direct Write class name invocation: Parent_class.parent_attribute (self)

1 classAnimal ():2 3 def __init__ (self, name):4Self.name =name5 6 def say_name (self):7 print (self.name)8 9 Ten classDog (Animal): One  A def __init__ (self, name): - animal.__init__ (self, name) -  the def say_name (self): - animal.say_name (self) -  -  +Dog = Dog ('Xiao Hu') -Dog.say_name () # print ' Little Tiger '

Extension: Instance objects and class objects call instance functions.

1 classAnimal ():2 3 def __init__ (self, name):4Self.name =name5 6 def say_name (self):7 print (self.name)8 9Animal = Animal ('Nada')TenAnimal.say_name () # instance Object Call instance function, output'Nada' OneThe Animal.say_name (Animal) # class object invokes an instance function and needs to pass in an object instance as a parameter, outputting'Nada'

2. Using the super (type, obj) method call: Super (Child_class, Child_object). Parent_attribute (ARG) "No need to write self"

1 classAnimal (Object):2 3 def __init__ (self, name):4 Super (Animal, self). __init__ ()5Self.name =name6 7 def say_name (self):8 print (self.name)9 Ten  One classDog (Animal): A  - def __init__ (self, name): - Super (Dog, self). __init__ (name) the  - def say_name (self): - Super (Dog, self). Say_name () -  +  -Dog = Dog ('Xiao Hu') +Dog.say_name () # Output'Xiao Hu'

Python subclass methods for calling parent class members