[pull] main from python:main #724
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Add `gi_state`, `cr_state`, and `ag_state` attributes to generators, coroutines, and async generators respectively. These attributes return the current state as a string (e.g., `GEN_RUNNING`, `CORO_SUSPENDED`). The `inspect.getgeneratorstate()`, `inspect.getcoroutinestate()`, and `inspect.getasyncgenstate()` functions now return these attributes directly. This is in preparation for making `gi_frame` thread-safe, which may involve stop-the-world synchronization. The new state attributes avoid potential performance cliffs in `inspect.getgeneratorstate()` and similar functions by not requiring frame access. Also removes unused `FRAME_COMPLETED` state and renumbers the frame state enum to start at 0 instead of -1.
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📚 Documentation preview 📚: https://cpython-previews--724.org.readthedocs.build/