MS python学习（12）

Mixins

https://learn.microsoft.com/en-us/shows/more-python-for-beginners/mixins-multiple-inheritance–more-python-for-beginners-10-of-20

写自己代码的时候不推荐mixin,但是做framework的时候可以用

# -*- coding:utf-8 -*-

class Connection():
    def __init__(self):
        self.connection = ''
    
    def connect(self):
        print('We are connecting from ' + self.connection)
        
class Loggable():
    def __init__(self):
        self.server = ''
        
    def log(self):
        print('Logging from ' + self.server)
        
# define a framework
def framework(item):
    if isinstance(item, Connection):
        item.connect()

    if isinstance(item, Loggable):
        item.log()
        
# define a sql connection
class Sql(Connection, Loggable):
    def __init__(self):
        super().__init__()
        self.connection = 'postgres DB'
        self.server = 'unknown Flask server'
        
mysql = Sql()
framework(mysql)

We are connecting from postgres DB
Logging from unknown Flask server

小甲鱼的讲解参考链接

TO BE CONTINUED…