[Python-Dev] PEP 443 - Single-dispatch generic functions

Paul Moore p.f.moore at gmail.com
Thu May 23 18:56:53 CEST 2013

On 23 May 2013 17:00, Walter Dörwald <walter at livinglogic.de> wrote:

> Should it be possible to register multiple types for the generic function
> with one register() call, i.e. should:
>    @fun.register(int, float)
>    def _(arg, verbose=False):
>       ...
> be allowed as a synonym for
>    @fun.register(int)
>    @fun.register(float)
>    def _(arg, verbose=False):

No, because people will misread register(int, float) as meaning first
argument int, second float. The double decorator is explicit as to what is
going on, and isn't too hard to read or write.

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