[Python-ideas] namedtuple baseclass

[Yury Selivanov]

Raymond,

On January 12, 2014 at 3:01:42 PM, Raymond Hettinger (raymond.hettinger at gmail.com) wrote:
>  
>  
> On Jan 11, 2014, at 11:04 PM, Yury Selivanov  
> wrote:
>  
> > I propose to add a baseclass for all namedtuples. Right now 'namedtuple'  
> > function dynamically creates a class derived from 'tuple',  
> which complicates
> > things like dynamic dispatch.
>  
> A named tuple is a protocol, not a class.

This line actually makes a lot of sense, thank you for the explanation.

Since it’s a protocol, and a widely used one, then how about reopening a 
discussion (started in #7796) on adding an ABC ‘collections.abc.NamedTuple’?

I understand the issue with structseq, but we can have the ABC now for
regular named tuples. If/Once the named tuple API is implemented for
structseqs, it will automatically conform to the proposed ABC.

Thank you,
Yury