Raymond Hettinger <[email protected]> added the comment:
Here's question to focus on: In what circumstances should a developer ever
prefer PyMapping_Check() over PyType_HasFeature() with Py_TPFLAGS_MAPPING?
The latter doesn't give any new, useful information:
return o && Py_TYPE(o)->tp_as_mapping &&
Py_TYPE(o)->tp_as_mapping->mp_subscript;
I don't see any reason to build on top of this. It's best to just let it go
gently into the good night without disrupting anything that currently happens
to work.
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<https://bugs.python.org/issue46376>
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