[3.9] bpo-45680: Clarify documentation on GenericAlias objects (GH-29335)
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…H-29335) The documentation on ``GenericAlias`` objects implies at multiple points that only container classes can define ``__class_getitem__``. This is misleading. This PR proposes a rewrite of the documentation to clarify that non-container classes can define ``__class_getitem__``, and to clarify what it means when a non-container class is parameterized. See also: initial discussion of issues with this piece of documentation in pythonGH-29308, and previous BPO issue [42280](https://bugs.python.org/issue42280). Also improved references in glossary and typing docs. Fixed some links. Co-Authored-By: Erlend Egeberg Aasland <[email protected]> Co-Authored-By: Ken Jin <[email protected]> Co-Authored-By: Alex Waygood <[email protected]>
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…ythonGH-29335) (pythonGH-30689) The documentation on ``GenericAlias`` objects implies at multiple points that only container classes can define ``__class_getitem__``. This is misleading. This PR proposes a rewrite of the documentation to clarify that non-container classes can define ``__class_getitem__``, and to clarify what it means when a non-container class is parameterized. See also: initial discussion of issues with this piece of documentation in pythonGH-29308, and previous BPO issue [42280](https://bugs.python.org/issue42280). Also improved references in glossary and typing docs. Fixed some links. (cherry picked from commit 0eae9a2) Co-Authored-By: Erlend Egeberg Aasland <[email protected]> Co-Authored-By: Ken Jin <[email protected]> Co-Authored-By: Alex Waygood <[email protected]>
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The documentation on
GenericAliasobjects implies at multiple points thatonly container classes can define
__class_getitem__. This is misleading.This PR proposes a rewrite of the documentation to clarify that non-container
classes can define
__class_getitem__, and to clarify what it means when anon-container class is parameterized.
See also: initial discussion of issues with this piece of documentation in
GH-29308, and previous BPO issue 42280.
Also improved references in glossary and typing docs. Fixed some links.
Co-Authored-By: Erlend Egeberg Aasland [email protected]
Co-Authored-By: Ken Jin [email protected]
Co-Authored-By: Alex Waygood [email protected]
(cherry picked from commit 0eae9a2)
https://bugs.python.org/issue45680