There are many ways of implementing the idea of dual hierarchies; here, we use a multiple-inheritance
__init__(val) self.val += 1 p = Incr(5) print(p.val) 答案 输出是 36 ,具体可以参考 New-style Classes , multiple-inheritance
__init__(val) self.val += 1 p = Incr(5) print(p.val) 答案 输出是 36 ,具体可以参考 New-style Classes , multiple-inheritance