多继承；无法从2个父类调用函数

Question

在Python 3.7.2的子类中无法从两个不同的父类调用这两个函数

我尝试调用默认构造函数以及用户定义的函数 它只是从参数列表中调用第一类函数。调用（Parent1，Parent2）时会调用Parent1函数，调用（Parent2，Parent1）时会调用Parent2函数。

class Parent1():
    def fun1(self):
        print("Fun1 from Parent1")
    def fun2(self):
        print("Fun2 from Parent1")
class Child1(Parent1):
    def fun2(self):
        print("Fun2 from Child1")
obj1 = Child1()
obj1.fun1()
obj1.fun2()
print("========Block========")
class Parent2():
    def fun1(self):
        print("Fun1 from Parent2")
class Child2(Parent1, Parent2):
    def fun1(self):
        super().fun1()
        print("Fun1 from Child2")
obj2 = Child2()
obj2.fun1()
print("========Block========")
class Child3(Parent2, Parent1):
    def fun1(self):
        super().fun1()
        print("Fun1 from Child3")
obj3 = Child3()
obj3.fun1()
print("========Block========")
class First(object):
    def __init__(self):
        super(First, self).__init__()
        print("First")
class Second(object):
    def __init__(self):
        super(Second, self).__init__()
        print("Second")
class Third(object):
    def __init__(self):
        super(Third, self).__init__()
        print("Third")
Third()

Answer 1

You can refer this link also

  class Parent1():
        def fun1(self):
            print("Fun1 from Parent1")
        def fun2(self):
            print("Fun2 from Parent1")

    class Child1(Parent1):
        def fun1(self):        
            Parent1.fun1(self)
            print("Fun2 from Child1")

    class Parent2():
        def fun1(self):
            print("Fun1 from Parent2")

    class Child2(Parent1, Parent2):
        def fun1(self):
            Parent1.fun1(self)
            Parent2.fun1(self)
            print("Fun1 from Child2")

    print("========Block========")
    obj1 = Child1()
    obj1.fun1()
    obj1.fun2()
    print("========Block========")    
    obj2 = Child2()
    obj2.fun1()
    print("========Block========")

o / p

========Block========
Fun1 from Parent1
Fun2 from Child1
Fun2 from Parent1
========Block========
Fun1 from Parent1
Fun1 from Parent2
Fun1 from Child2
========Block========