源码中这个场景,用 staticmethod 有很大的必要性吗? - V2EX
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firejoke
V2EX    Python

源码中这个场景,用 staticmethod 有很大的必要性吗?

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  •   firejoke 2019-01-10 16:56:46 +08:00 1605 次点击
    这是一个创建于 2478 天前的主题,其中的信息可能已经有所发展或是发生改变。

    基类:

    class Schema(object): ...... def filter(self, obj): filtered = {} for key, value in six.iteritems(obj): if self._filter_func(self.properties, key): filtered[key] = value ...... @staticmethod def _filter_func(properties, key): return key in properties 

    其中一个重写了该方法的子类:

    class PermissiveSchema(Schema): @staticmethod def _filter_func(properties, key): return True 

    感觉上完全不需要改成 staticmethod
    反正最终还是需要传类的属性进去

    2 条回复    2019-01-10 17:35:01 +08:00
    xpresslink
        1
    xpresslink  
       2019-01-10 17:16:09 +08:00   1
    完全没有必要,python 中 staticmethod 很少用到,只是当成类的不同工厂函数时候用一下的情况比较多。
    firejoke
        2
    firejoke  
    OP
       2019-01-10 17:35:01 +08:00
    @xpresslink 我也是觉得完全不必改成 staticmethod, 但源码中大量的工厂和抽象工厂,ABC 基类到处飞,
    让我深深怀疑自己没有坐着考虑的深,不敢去质疑作者......
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