Nick Coghlan <ncogh...@gmail.com> added the comment:
inspect.getattr_static has the necessary logic to search for descriptors
without invoking them.
However, it may be better to revert to the idea of pushing this functionality
back onto the individual descriptors and have the problematic descriptors like
property and staticmethod simply implement __isabstractmethod__ as a property.
property:
@property
def __isabstractmethod__(self):
return (self.fget.__isabstractmethod__ or
self.fset.__isabstractmethod__ or
self.fdel.__isabstractmethod__)
staticmethod/classmethod:
@property
def __isabstractmethod__(self):
return self.__func__.__isabstractmethod__
With this approach, the "one true way" to handle abstract descriptors would be
to do:
#instance method
@abstractmethod
def f(self):
...
@property
@abstractmethod
def f(self):
...
@classmethod
@abstractmethod
def f(self):
...
@staticmethod
@abstractmethod
def f(self):
...
This wouldn't allow for the prettier error messages, but it's much cleaner than
having ABCMeta trawling through class attribute dir() lists.
----------
nosy: +michael.foord
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Python tracker <rep...@bugs.python.org>
<http://bugs.python.org/issue11610>
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