[pull] main from python:main #747
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Fix a race condition where a thread could receive a partially-initialized module when another thread's import fails. The race occurs when: 1. Thread 1 starts importing, adds module to sys.modules 2. Thread 2 sees the module in sys.modules via the fast path 3. Thread 1's import fails, removes module from sys.modules 4. Thread 2 returns a stale module reference not in sys.modules The fix adds verification after the "skip lock" optimization in both Python and C code paths to check if the module is still in sys.modules. If the module was removed (due to import failure), we retry the import so the caller receives the actual exception from the import failure rather than a stale module reference. Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
Co-authored-by: Kumar Aditya <kumaraditya@python.org>
Fix compilation on C++. Add test on PyDateTime_IMPORT in test_cext and test_cppext.
Fix test_cext and test_cppext.
Co-authored-by: Stan Ulbrych <89152624+StanFromIreland@users.noreply.github.com>
The 'module' argument is now always needed to call the test_datetime method.
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