[Python-ideas] staticmethod and classmethod should be callable

[INADA Naoki]

>
>
> My question is really: assuming that we redesign
> staticmethod/classmethod anyway, should we make them callable?
>

​I think so.  staticmethod and classmethod should affect descriptor
behavior.
And it should behave as normal function.​

>>> @classmethod
... def foo(cls):
...     print(cls)
...
>>> @staticmethod
... def bar(arg):
...     print(arg)
...
>>> foo(int)  # this should work
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
TypeError: 'classmethod' object is not callable
>>> bar(42)  # this should work too
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
TypeError: 'staticmethod' object is not callable


When Python 4, I think we can even throw away classmethod and staticmethod
object.
PyFunction can have binding flag instead, like METH_CLASS and METH_STATIC
for PyCFunction.
classmethod and staticmethod is just a function which modify the flag.

​But I'm not sure.  Calling in Python is too complicated ​to fully
understand.

​Regards,​
-- 
INADA Naoki  <songofacandy at gmail.com>
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