1 print(sub1_class.__base__)    #查看sub1_class继承的第一个父类
2
3 print(sub2_class.__bases__)   #查看sub2_class 都继承了哪些父类

1 <class '__main__.parent_class_1'>
2
3 (<class '__main__.parent_class_1'>, <class'__main__.parent_class_2'>)

 1 class parent_class:               #创建父类
 2     money = 1000000000            #定义一个类属性：money
 3     def cost(self):               #定义一个方法：cost()
 4         print("如果你继承了，我的钱你都可以花")
 5 class sub_class(parent_class):    #创建子类，继承parent_class这个父类
 6     pass                          #类代码逻辑为空
 7 print(sub_class.money)            #通过子类，调用父类的属性
 8 sub_class.cost(sub_class)         #通过子类，调用父类的方法
 9 运行结果：
10 100000000011　如果你继承了，我的钱你都可以花

 1 class A:
 2     def test(self):
 3         print("A")
 4 class B(A):
 5      def test(self):
 6          print("B")
 7 class C(A):
 8     def test(self):
 9         print("C")
10 class D(C,B):
11     pass
12 #__mro__方法，打印出类继承的线性顺序列表
13 print(D.__mro__)
14 D．__mro__运行结果：
15 (<class '__main__.D'>, <class '__main__.C'>, <class '__main__.B'>, <class '__main__.A'>, <class 'object'>)

1 class Dog:
2     def jump(self):
3         print("我是父类：我非常爱跳")
4 class Tidy(Dog):
5     pass
6 s_1 = Tidy()
7 s_1.jump()
8 运行结果：
9 我是父类：我非常爱跳

 1 class Dog:
 2     def jump(self):
 3         print("我是父类：非常爱跳")
 4 class Tidy(Dog):
 5     def jump(self):
 6         print("我是子类：非常爱跳")
 7 s_1 = Tidy()
 8 s_1.jump()
 9 运行结果：
10 我是子类：非常爱跳

 1 class Foo:
 2     def f1(self):
 3         print("Foo.f1")
 4     def f2(self):
 5         print("Foo.f2")
 6         self.f1()
 7 class Bar(Foo):
 8     def f1(self):
 9         print("Bar.f1")
10 s_1 = Bar()
11 s_1.f2()

1 class Dog:                   #创建一个小狗的类
2     def jump(self):        #定义一个jump()方法
3         print("小狗正在跳")
4 class Tidy:
5     def __init__(self,name): #构造函数
6         self.name = name
7         self.jump = Dog()    #通过组合的方式，将Dog类赋值给self.jump属性
8 s_1 = Tidy("AA")
9 s_1.jump.jump()           #调用Dog类中的jump（）方法

 1 class School:
 2     def __init__(self,name,addr):
 3         self.name = name
 4         self.addr = addr
 5 class Course:
 6     def __init__(self,name,period,school):
 7         self.name = name
 8         self.period = period
 9         self.school = school
10
11 s_1 = School("一中","小石路")
12 s_2 = School("二中","中石路")
13 s_3 = School("三中","大石路")
14
15 msg="""
16 1:一中
17 2：二中
18 3：三中
19 """
20
21 while True:
22     print(msg)
23     menu = {
24         "1":s_1,
25         "2":s_2,
26         "3":s_3
27     }
28
29     choice = input("请输入你的选择：")
30     school_obj = menu[choice]
31     name = input("请输入课程名")
32     period = input("请输入学期")
33     new_course = Course(name,period,school_obj)
34     print("%s 属于%s"%(new_course.name,new_course.school.name))

 1 class Vehicle:
 2     def __init__(self,name,type,speed,):
 3         self.name = name
 4         self.type = type
 5         self.speed = speed
 6
 7
 8 class Bus(Vehicle):
 9     def __init__(self,name,type,speed,line):
10         Vehicle.__init__(self,name,type,speed)
11         self.line = line
12     def run(self):
13         print("%s路公交车马上就到了"%self.line)
14 s_1 = Bus("公家车","天然气","10km/h",1)
15 s_1.run()
16 运行结果：
17 1路公交车马上就到了！

 1 class Vehicle:
 2     def __init__(self,name,type,speed,):
 3         self.name = name
 4         self.type = type
 5         self.speed = speed
 6     def run(self):
 7         print("我是父类：开动了")
 8
 9
10 class Bus(Vehicle):
11     def __init__(self,name,type,speed,line):
12         # Vehicle.__init__(self,name,type,speed)
13         super(Bus,self).__init__(name,type,speed)
14         self.line = line
15     def run(self):
16         # Vehicle.run(self)
17         super().run()
18         print("%s路公交车马上就到了"%self.line)
19 s_1 = Bus("公家车","天然气","10km/h",1)
20
21 s_1.run()

 1 class A:
 2     def __init__(self):
 3         print("test A")
 4 class B(A):
 5     def __init__(self):
 6         print("test B")
 7         A.__init__(self)
 8 class C(A):
 9     def __init__(self):
10         print("test C")
11         A.__init__(self)
12 class D(C,B):
13     def __init__(self):
14         print("test D")
15         B.__init__(self)
16         C.__init__(self)
17 D()
18 运行结果：
19 test D
20 test B
21 test A
22 test C
23 test A