Raymond Hettinger added the comment:
> # Can't instantiate abstract class X with abstract methods
Sorry, this is how ABCs are supposed to work. They use @abstractmethod to
specify requirements that a subclass if required to implement. The ABC
metaclass then enforces that requirement, prevent
Max added the comment:
Sorry, this should be just a documentation issue.
I just realized that __eq__ = None isn't correct anyway, so instead we should
just document that Hashable cannot check for __eq__ and that explicitly
deriving from Hashable suppresses hashability.
--
components:
New submission from Max:
I think collections.abc.Hashable.__subclasshook__ should check __eq__ method in
addition to __hash__ method. This helps detect classes that are unhashable due
to:
to __eq__ = None
Of course, it still cannot detect:
def __eq__: return NotImplemented
but it's better t
