New submission from Matteo Dell'Amico <de...@linux.it>:
Is there a way to define an abstract classmethod? The two obvious ways
don't seem to work properly.
Python 3.0.1+ (r301:69556, Apr 15 2009, 17:25:52)
[GCC 4.3.3] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import abc
>>> class C(metaclass=abc.ABCMeta):
... @abc.abstractmethod
... @classmethod
... def f(cls): print(42)
...
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "<stdin>", line 3, in C
File "/usr/lib/python3.0/abc.py", line 24, in abstractmethod
funcobj.__isabstractmethod__ = True
AttributeError: 'classmethod' object has no attribute '__isabstractmethod__'
>>> class C(metaclass=abc.ABCMeta):
... @classmethod
... @abc.abstractmethod
... def f(cls): print(42)
...
>>> class D(C): pass
...
>>> D.f()
42
----------
components: Library (Lib)
messages: 86744
nosy: della
severity: normal
status: open
title: No way to create an abstract classmethod
type: behavior
versions: Python 3.0
_______________________________________
Python tracker <rep...@bugs.python.org>
<http://bugs.python.org/issue5867>
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