First of all, I am not so happy about typing is increasing Python runtime complexity.
TypeScript is the most successful language with gradual typing. It has almost zero-cost about typing. It doesn't make JavaScript runtime complex. I hoped Python goes in same way. But Python went the different way. typing affected Python runtime complexity, application memory footprint and startup time... Anyway, I like the idea of using `|` for union. I think there are two approaches to support it. a) Add `|` to all types. b) Support it only statically (`from __future__ import annotations`). Both ideas are explained in PEP 604 already. I prefer (b) to (a) because I don't want to increase runtime behavior for static typing. But (b) seems more consistent with PEP 560. Regards,
_______________________________________________ Python-ideas mailing list -- python-ideas@python.org To unsubscribe send an email to python-ideas-le...@python.org https://mail.python.org/mailman3/lists/python-ideas.python.org/ Message archived at https://mail.python.org/archives/list/python-ideas@python.org/message/H7ZNYEXC6UQ43I2MMMMTUOJUASOTAVBF/ Code of Conduct: http://python.org/psf/codeofconduct/
