python - 多继承；不能从 2 个父类调用函数

Question

无法从 Python 3.7.2 的 Child 类中的两个不同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个类函数。调用 (Parent1, Parent2) 时调用 Parent1 函数，调用 (Parent2, Parent1) 时调用 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()

标签： pythonpython-3.x

Answer 1

你也可以参考这个链接

  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========