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

Éric Araujo merwok at netwok.org
Thu May 23 23:17:47 CEST 2013

Le 23/05/2013 16:10, Łukasz Langa a écrit :

Does this work if the implementation function is called like the first decorated function? No, the register() attribute returns the undecorated function which enables decorator stacking, as well as creating unit tests for each variant independently.

Perfect. My web framework of choice uses decorators that register things and return the function as is and I love it. I guess the common pattern will be to use variants of the generic function name, e.g. func is implemented by func_int, func_str and co, which also helps debugging.

Making generic functions work with ABCs sounds like a requirement to me Yes, I will implement that.

Great!

Question: what happens if two functions (say in two different modules) are registered for the same type? Last one wins. Just like with assigning names in a scope, defining methods in a class or overriding them in a subclass.

Works for me.

Cheers

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