[Python-3000] callable()

[Greg Ewing]

Guido van Rossum wrote:
> So how about we change callable() and add hashable(), iterable() and
> whatever else makes sense so that these all become like this:
> 
>   def callable(x):
>     return getattr(x, "__call__", None) is not None

This *still* doesn't fully solve the problem in the case
of __hash__, since a container may be unhashable due to
its contents, even if it has a __hash__ method itself.

It might be good enough for whatever these hypothetical
hashability-testing use cases require though. We'd have
to catch one of those elusive beasts to find out...

--
Greg