Python (vii) Advanced section: Object-oriented

I. Definition of Class

# Object Oriented # meaningful object-oriented code # class =  Object-oriented #  Class, Object # instantiation #  class The most basic role: encapsulation

class Student ():     "'              = 0 def print_file (self): print ('       Name'+self.name)        print('name'+ str (self.age)) Student# instantiation student.print_file ()

Two, the difference between the function and the method

Methods and functions: Design-level functions: a kind of appellation of program running and past style

Third, class and object.

Classes are behaviors and characteristics that describe a class

object is a concrete description object

Class can generate many different objects like a template

Four, the constructor function

#class, ObjectclassStudent (): Name="' Age=0#Behavior and Characteristics    def __init__(self):#constructor Function        Print('Student')    defPrint_file (self):Print('name'+self.name)Print('name'+str (self.age)) s=Student () s.__init__() Student#The constructor is called when the instantiation is instantiatedStudent#The constructor is called separately

The constructor cannot return a value other than none

V. Distinguishing between module variables and variables in a class

Six, class variables and instance variables

Class variables: Variables related to classes

Instance variables: variables associated with an object

classStudent (): Name="'  #class VariablesAge =0#Behavior and Characteristics    #class variables, instance variables    def __init__(self,name,age):#constructor Function        #Initialize the properties of an objectSelf.name=name#Defining instance VariablesSelf.age= Age#print (' student ')    defPrint_file (self):Print('name'+self.name)Print('name'+str (self.age)) s=student (' Daming', 20)Print(S.name)#to print an instance variable, you need to save the instance variable inside the class

Print (Student.name) #打印类变量

Daming
‘‘

Vii. class and object variable lookup order

Viii. Self and example method

Ix. accessing instance variables and class variables in an instance method

X. Types of methods

Xi. static methods

12. Visibility of Members: public and private

13. Nothing is inaccessible

14, inheritance.

XV, subclass method Call Parent class method: Super keyword

Python (vii) Advanced section: Object-oriented