[pull] main from python:main#1232
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This module has a manual lazy import hack using `__getattr__`. Now that lazy imports exist and cannot be disabled, this could use lazy imports instead. Key differences: this will now show up in sys.lazy_modules when accessed. Error messages should be a bit better without the wrapper `__getattr__` involved. That's the only differences I can think of. Signed-off-by: Henry Schreiner <henryfs@princeton.edu> Co-authored-by: Gregory P. Smith <greg@krypto.org>
…ree-threading (gh-151768) In free-threading builds, concurrent calls to sys.getdlopenflags() and sys.setdlopenflags() race on interp->imports.dlopenflags. Fix by using FT_ATOMIC_LOAD_INT_RELAXED / FT_ATOMIC_STORE_INT_RELAXED in _PyImport_GetDLOpenFlags and _PyImport_SetDLOpenFlags, consistent with how analogous interpreter-state integer fields (lazy_imports_mode, pystats_enabled) are protected. Relaxed ordering is correct here: dlopenflags is a standalone config integer with no ordering relationship to other memory. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
The hang this test guards against (interpreter exit after shutdown(wait=False) with running futures) was fixed for ProcessPoolExecutor by the executor management rewrite years ago, but the test still skipped it citing the issue. The skip also hid a latent NameError in the subprocess template, which only selects a start method in the process pool variants; rewrite it to use the same mp_context=get_context() shape as the sibling templates. Remove a stale comment claiming ProcessPoolExecutor often hangs with wait=False. Co-authored-by: Claude Fable 5 <noreply@anthropic.com>
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