python中有没有一种方法可以把内部类的对象和外部类的对象集成起来？

class OuterClass:
    def __init__(self, outer_attr):
        self.outer_attr = outer_attr
        self.inner_obj = self.InnerClass()

    def outer_method(self):
        print("This is the outer method")

    class InnerClass:
        def __init__(self):
            self.inner_attr = "Inner attribute"

        def inner_method(self):
            print("This is the inner method")

# 创建外部类对象
outer_obj = OuterClass("Outer attribute")

# 访问外部类的属性和方法
print(outer_obj.outer_attr)
outer_obj.outer_method()

# 访问内部类的属性和方法
print(outer_obj.inner_obj.inner_attr)
outer_obj.inner_obj.inner_method()

Outer attribute
This is the outer method
Inner attribute
This is the inner method