python - 具有所有静态方法的类

Question

<分区>

Answer 1

如果所有方法都是静态的，则不需要类。

(如果您有一个只有 init 和 1 个方法的类，则相同)

一些类.py

class SomeClass:

    @staticmethod
    def somemethod(...):
        pass

    @staticmethod
    def somemethod2(...):
        pass

    @staticmethod
    def somemethod3(...):
        pass

然后你主要像这样使用它:

from someclass import SomeClass
some_class = SomeClass()
some_class.somemethod()
....

我总是将此类重构为简单的方法

一些类.py

def somemethod(...):
    pass

def somemethod2(...):
    pass

def somemethod3(...):
    pass

然后我这样使用它:

import someclass
someclass.somemethod()
...

这不是更干净、更简单吗？

额外信息

class SomeClass:

    foo = 1

    def __init__(self, bar):
        self.bar = bar
        self.foo = 2

    @staticmethod
    def somemethod():
        # no access to self nor cls but can read foo via SomeClass.foo (1)
        foo = SomeClass.foo
        SomeClass.someclassmethod()
        ...

    @classmethod
    def someclassmethod(cls, ...):
        # access to cls, cls.foo (always 1), no access to bar
        foo = cls.foo
        ...

    def someinstancemethod(self, ...):
        # access to self, self.bar, self.foo (2 instead of 1 because of init)
        foo = self.foo
        bar = self.bar
        self.somemethod()
        self.someclassmethod()
        ...