[3.13] Document Py_AddPendingCall() change with subinterpreters in 3.12 (GH-139117)#139119
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…ythonGH-139117) Prior to 3.9, Py_AddPendingCall() would always run pending calls in the main interpreter, but then each interpreter got their own ceval state, and they were scheduled for any interpreter. In pythonGH-104813, this was undone, so Py_AddPendingCall() would always schedule for the main interpreter. (cherry picked from commit 89ff88b) Co-authored-by: Peter Bierma <zintensitydev@gmail.com>
bedevere-appbot added awaiting review docs 
ZeroIntensity approved these changes Sep 18, 2025
ZeroIntensity merged commit 24b6992 into python:3.13 35 of 36 checks passed
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Prior to 3.9, Py_AddPendingCall() would always run pending calls in the main interpreter, but then each interpreter got their own ceval state, and they were scheduled for any interpreter. In GH-104813, this was undone, so Py_AddPendingCall() would always schedule for the main interpreter.
(cherry picked from commit 89ff88b)
Co-authored-by: Peter Bierma zintensitydev@gmail.com
📚 Documentation preview 📚: https://cpython-previews--139119.org.readthedocs.build/