[Python-Dev] namedtuple implementation grumble

[Antoine Pitrou]

Le 09/06/2014 00:05, Raymond Hettinger a écrit :
>
> Another issue is that a straight abc wouldn't be sufficient.  What we
> would really want is to check for is:
> 1) the presence of a _fields tuple (an abc can do this)
> 2) to check that all of the attribute names specified in _fields are
> defined (ABCMeta doesn't do this)
> 3) and that the type is a Sequence (ABCMeta can do this).
>
> An tricked-out ABC extension might be worth it if it provided some
> non-trivial mixin capabilities for implementing homegrown named tuples
> (not created by the factory function), but I don't think we want to go
> there.

Instead of an ABC, why not a simple is_namedtuple() function?

Regards

Antoine.