这个方法比较好:

class DataHolder:    def __init__(self, value=None):        self.value = value    def set(self, value):        self.value = value        return value    def get(self):        return self.valuedh = DataHolder()if dh.set(something()):  # do something with dh.valueelif dh.set(somethingelse()):  # ...

参考链接: