我正在创建一个Python程序，其中来自两个不同类的对象必须交互

class ClassA:
    def method_a(self):
        print("This is method A")

class ClassB:
    def method_b(self):
        print("This is method B")

# 创建对象
obj_a = ClassA()
obj_b = ClassB()

# 调用方法实现交互
obj_a.method_a()
obj_b.method_b()

class ClassA:
    def method_a(self):
        print("This is method A")

class ClassB(ClassA):
    def method_b(self):
        print("This is method B")

# 创建对象
obj_b = ClassB()

# 调用方法实现交互
obj_b.method_a()
obj_b.method_b()

class ClassA:
    def method_a(self):
        print("This is method A")

class ClassB:
    def __init__(self, obj_a):
        self.obj_a = obj_a

    def method_b(self):
        print("This is method B")
        self.obj_a.method_a()

# 创建对象
obj_a = ClassA()
obj_b = ClassB(obj_a)

# 调用方法实现交互
obj_b.method_b()