[Python-ideas] Fwd: Consider allowing the use of abstractmethod without metaclasses

[Victor Stinner]

Le 20 juil. 2017 3:49 AM, "INADA Naoki" <songofacandy at gmail.com> a écrit :
> I'm +1 with your idea in performance point of view.

(...)
But ABC is too heavy to use only for checking abstract methods.
It uses three inefficient WeakSet [1] and it overrides isinstance and
issubclass
with slow Python implementation.


I don't think that we can get ride of abc from the io and importlib. They
are here to stay. I hear your performance analysis.

Why not making abc faster instead of trying to workaround abc for perf
issue?

Someone already wrote WeakrefSet, a PR is waiting for our review!

Victor
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