[Python-Dev] namedtuple implementation grumble

Antoine Pitrou antoine at python.org
Mon Jun 9 13:40:41 CEST 2014

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?



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