[Python-Dev] C-level duck typing

[martin at v.loewis.de]

> So maybe it's worth thinking about making a general mechanism
> available for third parties to extend the type object without
> them all needing to have their own tp_flags bits and without
> needing to collude with each other to avoid conflicts.

That mechanism is already available. Subclass PyTypeType, and
add whatever fields you want.

Regards,
Martin