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gh-141196: Fix threading.Semaphore documentation inconsistency - #141243
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mohsinm-dev wants to merge 3 commits into
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gh-141196: Fix threading.Semaphore documentation inconsistency#141243mohsinm-dev wants to merge 3 commits into
mohsinm-dev wants to merge 3 commits into
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Changed "Objects of different types, except different numeric types, never compare equal" to "Objects of different types, unless documented otherwise, never compare equal" to account for documented exceptions like set/frozenset comparisons.
The acquire() method documentation stated 'Exactly one thread will be awoken by each call to release()' which became incorrect when the n parameter was added to release() in Python 3.9. The release() method documentation was ambiguous about behavior when n > waiting_threads. Changes: - acquire(): Updated to reflect that release(n) wakes min(j,n) threads where j = waiting threads - release(): Clarified that it wakes 'up to n' threads, or all available if fewer than n are waiting The fix aligns documentation with actual implementation behavior in Lib/threading.py where release(n) calls Condition.notify(n).
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Summary
Fixes issue #141196 by correcting inconsistent documentation in threading.Semaphore.
Problem
The acquire() method documentation stated "Exactly one thread will be awoken by each call to release()" which became incorrect when the n parameter was added to release() in Python 3.9.
Solution
Implementation
The fix aligns documentation with actual behavior: Semaphore.release(n) calls Condition.notify(n), which wakes exactly min(n, waiting_threads) threads.
Testing
Verified with test cases:
Documentation-only change, no code modifications required.
📚 Documentation preview 📚: https://cpython-previews--141243.org.readthedocs.build/