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</html>我刚开始学习OOP并试图弄清楚如何在练习中使用它。
答案 0 :(得分：2)
简短回答：这是不可能的（或者，如果它不容易），因为只要class A:开始的阻止没有完成，你就无法访问A。
但是您可以将其定义为属性：
class A:
x = 'variable'
class B:
@property
def x(self):
return A.x
方法和属性中的代码在调用时执行，因此调用在class A定义后发生。所以你可以使用它：
>>> A.B().x
'variable'
但是，如果您“刚刚开始学习OOP”，我强烈建议您不使用嵌套类。尝试关注一些真实的OOP主题，如inheritance。