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Aurélien Bompard (abompard@piaille.fr)'s status on Monday, 13-Mar-2023 17:48:46 CET Aurélien Bompard
in reply to
- Hynek Schlawack
@hynek It is also 4 times slower until Python 3.11: https://github.com/python/cpython/issues/91603
In conversation Monday, 13-Mar-2023 17:48:46 CET from piaille.fr permalink
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1. Speed up isinstance on union types · Issue #91603 · python/cpython
  
  PEP 604 allows isinstance on union types but it much slower compared to a tuple of types. This can be speed up with a fast path. Currently it is almost 4x slower, so there is room for improvement. ...
- Hynek Schlawack (hynek@mastodon.social)'s status on Monday, 13-Mar-2023 17:48:47 CET Hynek Schlawack
  
  TIL I can use `|` instead of tuples in isinstance() checks since #Python 3.10.
  In conversation Monday, 13-Mar-2023 17:48:47 CET permalink
  Attachments
  1. >>> isinstance(42, int | str) True >>> isinstance("42", int | str) True >>> isinstance(42.0, int | str) False
    https://files.mastodon.social/media_attachments/files/110/014/566/176/837/015/original/9c786b522bd559a0.png
  Ekaitz Zárraga 👹 repeated this.

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