一、Python支持多根继承

• Python允许多根继承，跟C++一样，一个类可以继承多个父类，即一子多父。
• 虽然Java语言不允许多根继承，只能继承一个父类，但是可实现多个父接口。

二、案例演示Python多根继承

• Student类继承Person类
• Test01类继承Speaker类与Student类
• Test02类继承Student类与Speaker类
• 如果两个父类有同名方法，那么继承第一个父类的同名方法
• 大爸和二爸就同一件事发表看法，听谁的？Python说：听大爸的！

1、创建程序 - 演示多根继承.py

# -*- coding: utf-8 -*-
"""
Created on Thu Oct 15 18:46:52 2020

@author: howard

演示多根继承
"""

class Person:
    name = ''
    age = 0
    __weight = 0
    
    def __init__(self, name, age, weight):
        self.name = name
        self.age = age
        self.__weight = weight
        
    def speak(self):
        print('{} say: I\'m {} years old and {} pounds.'.format(self.name, self.age, self.__weight))        
        

class Student(Person):    
    
    def __init__(self, name, age, weight, grade):  
        self.age = age
        self.__weight = weight
        self.grade = grade
        
    def speak(self):        
       print("{} says: I'm {} years old, {} pounds and in Grade {}.". \
             format(self.name, self.age, self.__weight, self.grade))
        

class Speaker:
    topic = ''
    name = ''
    
    def __init__(self, name, topic):
        self.name = name
        self.topic = topic
        
    def speak(self):
        print("My name is {}, I am a speaker.\nThe theme of my speech is {}.".format(self.name, self.topic))
              

class Test01(Speaker, Student):        
    def __init__(self, name, age, weight, grade, topic):
        Student.__init__(self, name, age, weight, grade)
        Speaker.__init__(self, name, topic)
        
test01 = Test01("Tim", 25, 80, 4, "Python")
test01.speak() # 调用的是Speaker的speak()方法

class Test02(Student, Speaker):        
    def __init__(self, name, age, weight, grade, topic):
        Student.__init__(self, name, age, weight, grade)
        Speaker.__init__(self, name, topic)
        
test02 = Test02("Tim", 25, 80, 4, "Python")
test02.speak() # 调用的是Student的speak()方法

2、运行程序，查看结果