8000 gh-72971: Clarify the special no-TypeError behavior for equality by Gouvernathor · Pull Request #110729 · python/cpython · GitHub
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gh-72971: Clarify the special no-TypeError behavior for equality #110729

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Merged
merged 7 commits into from
Mar 3, 2024
Merged

gh-72971: Clarify the special no-TypeError behavior for equality #110729

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04d5ff6
Clarify the special no-TypeError behavior for equality
Gouvernathor Oct 11, 2023
5746dcc
of course
Gouvernathor Oct 11, 2023
71182cd
Rephrase following feedback
Gouvernathor Jan 2, 2024
7aa224a
Shorten again
Gouvernathor Jan 2, 2024
e9f1104
Merge branch 'main' into patch-7
Gouvernathor Mar 1, 2024
6055434
Use data role and forgotten "the"
Gouvernathor Mar 1, 2024
820c538
Restore NotImplemented link
erlend-aasland Mar 3, 2024
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6 changes: 6 additions & 0 deletions Doc/reference/datamodel.rst
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Expand Up @@ -1613,6 +1613,12 @@ Basic customization
the left operand's method has priority. Virtual subclassing is
not considered.

When no method returns any value other than NotImplemented, comparisons raise
a :exc:`TypeError`. However, the ``==`` and ``!=`` operators will not raise an
exception in that case, and will instead fall back to ``is`` and ``is not``,
respectively. That way, even though ``object().__eq__(object())`` returns
NotImplemented, ``object() == object()`` returns False.

.. method:: object.__hash__(self)

.. index::
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