docs: rename "value restriction" to "value-constrained type variable"#21112
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hauntsaninja merged 1 commit intopython:masterfrom Mar 31, 2026
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Align documentation terminology with the runtime attribute name (`TypeVar.__constraints__`). The section now uses "value-constrained type variable" consistently, and the old anchor `type-variable-value-restriction` is kept alongside the new one `value-constrained-type-variables` to avoid breaking external links. Closes python#17828 Made-with: Cursor
hauntsaninja
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Mar 31, 2026
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Closes #17828.
The docs used "value restriction" to describe type variables like
T: (str, bytes), but the runtime attribute isTypeVar.__constraints__. This PR updates the terminology across the affected doc pages to use "value-constrained type variable" consistently, matching the runtime naming and the term discussed in #17828.Changes:
generics.rst: rename section title, update prose, add new anchorvalue-constrained-type-variables(old anchortype-variable-value-restrictionkept for backward compat)more_types.rst: update cross-reference textcommand_line.rst: update cross-reference textMade with Cursor