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PEP 742 – Narrowing types with TypeIs | peps.python.org

https://peps.python.org/pep-0742

“This PEP proposes a new special form, TypeIs, to allow annotating functions that can be used to narrow the type of a value, similar to the builtin isinstance(). Unlike the existing typing.TypeGuard special form, TypeIs can narrow the type in both the if...” (the page’s own description)

Topic: Software Development
Quality: Quality 87 scored 12 Aug 2025
Language: english
Text on page: 17,242 characters
Page size: 71 kB
Answered: OK (200), HTML
Last read: 7 Jul 2025
In our index since: 7 Jul 2025
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