[Python-Dev] PEP 443 - Single-dispatch generic functions (original) (raw)

Ben Hoyt benhoyt at gmail.com
Fri May 24 00:58:01 CEST 2013

So I am a strong +1 on allowing multiple types to be registered in one call.

Yeah, agreed. It also fits the pattern set by isinstance(), which allows a tuple of types, like isinstance(x, (int, str)).

That said, I'm +0 on this PEP itself. It seems no one has provided decent use-case examples (apart from contrived ones), from the stdlib for example. In the fairly large codebase I work on, it'd only be used in one place, and even there the PEP's approach is arguably too simple for what we're doing. It seems to me for the few times this would be used, direct and simple use of isinstance() would be clearer. But maybe that's just our particular codebase.

-Ben

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