Issue 668980: classmethod does not check its arguments (original) (raw)

This issue has been migrated to GitHub: https://github.com/python/cpython/issues/37781

classification

process

Created on 2003-01-16 10:22 by loewis, last changed 2022-04-10 16:06 by admin. This issue is now closed.

Messages (3)
msg14099 - (view)	Author: Martin v. Löwis (loewis) *	Date: 2003-01-16 10:22
In 2.3a1, classmethod(3) works just fine. I think it should be a type error. It might be worthwhile to specialcase method objects, so that class X: def foo(self):pass X.foo=classmethod(X.foo) does the "right" thing, i.e. is equivalent to class X: def foo(self):pass foo=classmethod(foo)
msg14100 - (view)	Author: Guido van Rossum (gvanrossum) *	Date: 2003-01-16 14:52
Logged In: YES user_id=6380 Not convinced; there are subtle things you might want to do with classmethod (and staticmethod) that a type check would prevent. I could live with something that checks whether the argument is callable. There are definitely some weird things: >>> C.x = classmethod(12) >>> C.x() Traceback (most recent call last): File "", line 1, in ? SystemError: ../Objects/classobject.c:2081: bad argument to internal function >>> vs. >>> C.x = staticmethod(12) >>> C.x() Traceback (most recent call last): File "", line 1, in ? TypeError: 'int' object is not callable >>> Anyway I have bigger fish to fry for now.
msg14101 - (view)	Author: Neal Norwitz (nnorwitz) *	Date: 2003-07-02 03:52
Logged In: YES user_id=33168 classmethod(3) does raise a TypeError in 2.3b2. Should this be closed?