使staticmethod对象可调用吗？ [英] Make staticmethod objects callable?
问题描述
大家好，
我想知道制作静态方法对象是否有意义
可调用，以便以下代码可以正常工作：
A类：
@staticmethod
def foo（）：传递
bar = foo（）
我理解staticmethod对象不需要为其他用例实现__call__
，但实现它仍然有意义
__call__用于该特定用例？它会以任何方式容易出错吗？
Thx和问候，
Nicolas
Hi everyone,
I was wondering if it would make sense to make staticmethod objects
callable, so that the following code would work:
class A:
@staticmethod
def foo(): pass
bar = foo()
I understand staticmethod objects don''t need to implement __call__ for
their other use cases, but would it still make sense to implement
__call__ for that specific use case? Would it be error-prone in any way?
Thx and regards,
Nicolas
推荐答案
Nicolas Fleury写道：
Nicolas Fleury wrote:
我想知道使静态方法对象可以调用是否有意义，以便下面的代码可以工作：
A级：
@staticmethod
def foo（）：传递
bar = foo（）
I was wondering if it would make sense to make staticmethod objects
callable, so that the following code would work:
class A:
@staticmethod
def foo(): pass
bar = foo()
你有吗？现实世界的用例？我几乎从不使用
staticmethods（宁愿选择使用模块级函数）所以我很难说b $ b很难想出一些代码真的
很有用。我也有点想要打破
classmethod和staticmethod之间的平行关系，这些方法目前只是*描述符
（没有任何其他特殊功能）。
也许而不是只使staticmethods可以调用，静态方法
和classmethods可以获得一个''im_func''属性，比如绑定和
unbound方法有？
STeVe
Do you have a real-world use case? I pretty much never use
staticmethods (preferring instead to use module-level functions) so I''m
having a hard time coming up with some code where this would be really
useful. I''m also a little wary of breaking the parallel between
classmethod and staticmethod which are currently *just* descriptors
(without any other special functionality).
Maybe instead of making just staticmethods callable, both staticmethods
and classmethods could gain an ''im_func'' attribute like bound and
unbound methods have?
STeVe
Em Ter，2006-02-28？* s 15：17 -0500，Nicolas Fleury escreveu：
Em Ter, 2006-02-28 ?*s 15:17 -0500, Nicolas Fleury escreveu:
A类：
@staticmethod
def foo（）：传递
bar = foo（）
class A:
@staticmethod
def foo(): pass
bar = foo()
＃为什么不：
def foo（）：通过
A级：
吧= foo（）
foo = staticmethod（foo）
-
Quem excele em empregar a for？§一个militar subjulga os ex ?? rcitos dos
outros povos sem travar batalha，toma cidades fortificadas dos outros
povos sem as atacar e destr？3i os estados dos outros povos sem lutas
prolongadas。 Deve lutar sob o C ?? u com o prop？3sito primordial da
''preserva？§？£o''。 Desse modo suas armas n？£se se embotar？£o，e os ganhos
poder？£o ser preservados。 Essa ?? a estrat ?? gia para planejar ofensivas。
- Sun Tzu，emA arte da guerra
# Why not:
def foo(): pass
class A:
bar = foo()
foo = staticmethod(foo)
--
"Quem excele em empregar a for?§a militar subjulga os ex??rcitos dos
outros povos sem travar batalha, toma cidades fortificadas dos outros
povos sem as atacar e destr?3i os estados dos outros povos sem lutas
prolongadas. Deve lutar sob o C??u com o prop?3sito primordial da
''preserva?§?￡o''. Desse modo suas armas n?￡o se embotar?￡o, e os ganhos
poder?￡o ser preservados. Essa ?? a estrat??gia para planejar ofensivas."
-- Sun Tzu, em "A arte da guerra"
Felipe Almeida Lessa写道：
Felipe Almeida Lessa wrote:
Em Ter，2006-02-28？* s 15:17 -0500，Nicolas Fleury escreveu：
Em Ter, 2006-02-28 ?*s 15:17 -0500, Nicolas Fleury escreveu:
A级：
@staticmethod
def foo（）：传递
bar = foo（）
class A:
@staticmethod
def foo(): pass
bar = foo()
＃为什么不：
def foo（）：传递
A类：
bar = foo（）
foo = staticmethod（foo）
# Why not:
def foo(): pass
class A:
bar = foo()
foo = staticmethod(foo)
好吧，你甚至可以这样做：
A级：
def foo（）：传递
bar = foo（）
staticmethod（foo）
但是，为装饰器设置特殊语法会有点难过。这是一个
可用性问题，与功能无关。有明显的
解决方法，但恕我直言，任何用户说它应该只是工作部分正确至少
。
问候，
Nicolas
Well, you could even do:
class A:
def foo(): pass
bar = foo()
staticmethod(foo)
But it''s a bit sad to have a special syntax for decorators then. It''s a
usability problem, nothing to do with functionality. There''s obvious
workarounds, but IMHO any user saying "it should just work" is at least
partly right.
Regards,
Nicolas
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