在Python中不继承或委托的情况下重用另一个类中的方法

class ClassA:
    def methodA(self):
        print("This is methodA from ClassA")

class ClassB:
    def __init__(self):
        self.classA = ClassA()

    def methodB(self):
        print("This is methodB from ClassB")
        self.classA.methodA()

b = ClassB()
b.methodB()

This is methodB from ClassB
This is methodA from ClassA

class ClassA:
    @staticmethod
    def methodA():
        print("This is methodA from ClassA")

def methodB():
    print("This is methodB")

ClassA.methodA()
methodB()

This is methodA from ClassA
This is methodB