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Python sentinel objects, type hints, and PEP 661

death and gravity · published 10 June 2021

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https://www.python.org/dev/peps/pep-0661/
python.org
https://www.python.org/dev/peps/pep-0483/
python.org
https://docs.python.org/3/library/functions.html
docs.python.org
https://python-patterns.guide/python/sentinel-object/
python-patterns.guide
https://github.com/python/cpython/blob/5571cabf1b3385087aba2c7c10289bba77494e08/Python/bltinmodule.c
github.com
https://github.com/python/cpython/blob/c8353239eda0d05f7facd1a19acc2b836a057807/Lib/dataclasses.py
github.com
https://github.com/python-attrs/attrs/blob/9709dd82e1cc0f5b783f4127e87498dfdd6a224a/src/attr/_make.py
github.com
https://www.attrs.org/en/stable/api.html
attrs.org
https://github.com/pallets/werkzeug/blob/eff04478a83619b4d7f15e6eee16a99bd80ed879/src/werkzeug/_internal.py
github.com
https://github.com/lemon24/reader/blob/1.18/src/reader/types.py
github.com
https://docs.python.org/3/library/constants.html
docs.python.org
https://mail.python.org/archives/list/python-dev@python.org/message/JBYXQH3NV3YBF7P2HLHB5CD6V3GVTY55/
mail.python.org
https://www.python.org/dev/peps/
python.org
https://discuss.python.org/t/sentinel-values-in-the-stdlib/8810
discuss.python.org
https://discuss.python.org/t/pep-661-sentinel-values/9126
discuss.python.org
https://news.ycombinator.%63%6f%6d/submitlink?u=https%3A//death.andgravity.com/sentinels&t=Python%20sentinel%20objects%2C%20type%20hints%2C%20and%20PEP%20661
news.ycombinator.%63%6f%6d
https://bsky.%61%70%70/intent/compose?text=Python%20sentinel%20objects%2C%20type%20hints%2C%20and%20PEP%20661%20https%3A//death.andgravity.com/sentinels
bsky.%61%70%70
https://www.linkedin.%63%6f%6d/sharing/share-offsite/?url=https%3A//death.andgravity.com/sentinels
linkedin.%63%6f%6d
https://twitter.%63%6f%6d/%73%68%61%72%65?text=Python%20sentinel%20objects%2C%20type%20hints%2C%20and%20PEP%20661&url=https%3A//death.andgravity.com/sentinels&via=_andgravity
twitter.%63%6f%6d
https://web.archive.org/web/20201112004749/http://effbot.org/zone/default-values.htm
web.archive.org
https://www.reddit.com/r/Python/comments/nvt59p/why_doesnt_python_support_function_overloading/h15ayin
reddit.com
https://docs.python.org/3/library/sys.html?highlight=intern
docs.python.org
https://docs.python.org/3/reference/datamodel.html
docs.python.org
https://www.reddit.com/r/Python/comments/ntipjq/x/h0u7k35
reddit.com