[3.15] gh-149044: Improve Py_tp_base[s] docs & error message for non-type bases (GH-151252)#151606
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…ype bases (pythonGH-151252) The initial implementation of PEP 820 worsened the error message when non-types are given as base types in Py_tp_bases & Py_tp_base. Bring back the 'bases must be types' wording and add a 'got' note for easier debugging. Improve slot ID documentation, and soft-deprecate Py_tp_base (as per the PEP). (cherry picked from commit 16185e9fe2037d2171626f79c3d099bd7772b53e) Co-authored-by: Petr Viktorin <encukou@gmail.com>
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StanFromIreland,
ZeroIntensity,
hugovk and
markshannon
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This was referenced Jun 17, 2026
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The initial implementation of PEP 820 worsened the error message
when non-types are given as base types in Py_tp_bases & Py_tp_base.
Bring back the 'bases must be types' wording and add a 'got' note for
easier debugging.
Improve slot ID documentation, and soft-deprecate Py_tp_base
(as per the PEP).
(cherry picked from commit 16185e9)
Co-authored-by: Petr Viktorin encukou@gmail.com