Python Object-oriented

Class and object relationships:
    Class: is a model
    Object: An entity created by a model that can be seen and touched.
The difference between classes and objects
    It's just a concept, it's a class.
    The description is very specific  , that is the object
3 Elements of a class
    Class name, property, method
Mouse
    Properties: Can glow, color, price, logo
    Method (behavior/function/operation): Some special function keys, left button, right button
Cell phone
    Properties: Color, size, brand, battery capacity
    Method: Listen to songs, call, send text messages, play games, take pictures
Air conditioning
    Properties: Height, size, color, brand, power
    Method: Left pendulum and pendulum, switch, hot/cool

Abstract of class
    Describe the scene in real life in class
Definition of Class
    1. Class name recommended way to use hump
    2. When defining the method, you need to write the self

Object
    1. How to create an Object cat ()  opens up a memory space in memory to generate a Cat object
    2.cat = Cat ()  uses a variable to point to this memory space
    3.self: Who calls, Self is who.
    4. A method in a class must have a parameter that does not necessarily self, who invokes it, and passes it in as the first argument.
__init__ Method:

Python Object-oriented