[Python-Dev] sys.implementation (original) (raw)

Antoine Pitrou solipsis at pitrou.net
Wed May 9 16:50:39 CEST 2012

On Wed, 9 May 2012 10:44:59 -0400 Brett Cannon <brett at python.org> wrote:

> I wish there was a builtin class > > class record: > pass > > which can be used to create objects which have only attributes > and no methods.

I have heard this request now a bazillion times over the years. Why don't we have such an empty class sitting somewhere in the stdlib with a constructor classmethod to simply return new instances (and if you want to get really fancy, optional keyword arguments to update the instance with the keys/values passed in)? Is it simply because it's just two lines of Python that everyone has replicated at some point?

In this case, it's because sys is a built-in module written in C, and importing Python code is a no-go.

We have a similar problem with ABCs: io jumps through hoops to register its implementation classes with the I/O ABCs.

Regards

Antoine.

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