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

Łukasz Langa lukasz at langa.pl
Thu May 23 16:58:27 CEST 2013

On 23 maj 2013, at 16:49, Guido van Rossum <guido at python.org> wrote:

> Łukasz, are there any open issues? Otherwise I'm ready to accept the PEP.

There's one. Quoting the PEP:

"The dispatch type is currently specified as a decorator argument. The
implementation could allow a form using argument annotations. This usage
pattern is out of scope for the standard library (per PEP 8). However,
whether this registration form would be acceptable for general usage, is
up to debate."

I feel that the PEP should explicitly allow or disallow for the
implementation to accept dispatch on annotations, e.g.:

def _(arg: int):


def _(arg):

Best regards,
Łukasz Langa

WWW: http://lukasz.langa.pl/
Twitter: @llanga
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