https://github.com/python/cpython/commit/423ae0ff36c6485f722e0fe3274124dc3df09862 commit: 423ae0ff36c6485f722e0fe3274124dc3df09862 branch: main author: Henry Schreiner <[email protected]> committer: gpshead <[email protected]> date: 2026-07-03T18:11:16Z summary:
gh-150579: use lazy imports for concurrent.futures (GH-150585) 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 <[email protected]> Co-authored-by: Gregory P. Smith <[email protected]> files: A Misc/NEWS.d/next/Library/2026-07-03-17-29-34.gh-issue-150579.0tLpQukIU.rst M Lib/concurrent/futures/__init__.py diff --git a/Lib/concurrent/futures/__init__.py b/Lib/concurrent/futures/__init__.py index d6ac4b3e0b675f..5d53a5ac50931d 100644 --- a/Lib/concurrent/futures/__init__.py +++ b/Lib/concurrent/futures/__init__.py @@ -17,6 +17,9 @@ wait, as_completed) +lazy from .process import ProcessPoolExecutor +lazy from .thread import ThreadPoolExecutor + __all__ = [ 'FIRST_COMPLETED', 'FIRST_EXCEPTION', @@ -40,26 +43,9 @@ _interpreters = None if _interpreters: + lazy from .interpreter import InterpreterPoolExecutor # noqa: F401 __all__.append('InterpreterPoolExecutor') def __dir__(): return __all__ + ['__author__', '__doc__'] - - -def __getattr__(name): - global ProcessPoolExecutor, ThreadPoolExecutor, InterpreterPoolExecutor - - if name == 'ProcessPoolExecutor': - from .process import ProcessPoolExecutor - return ProcessPoolExecutor - - if name == 'ThreadPoolExecutor': - from .thread import ThreadPoolExecutor - return ThreadPoolExecutor - - if _interpreters and name == 'InterpreterPoolExecutor': - from .interpreter import InterpreterPoolExecutor - return InterpreterPoolExecutor - - raise AttributeError(f"module {__name__!r} has no attribute {name!r}") diff --git a/Misc/NEWS.d/next/Library/2026-07-03-17-29-34.gh-issue-150579.0tLpQukIU.rst b/Misc/NEWS.d/next/Library/2026-07-03-17-29-34.gh-issue-150579.0tLpQukIU.rst new file mode 100644 index 00000000000000..7aff384431edc7 --- /dev/null +++ b/Misc/NEWS.d/next/Library/2026-07-03-17-29-34.gh-issue-150579.0tLpQukIU.rst @@ -0,0 +1,2 @@ +:mod:`concurrent.futures` now uses lazy imports for its executor submodules +instead of a module ``__getattr__`` hook. _______________________________________________ Python-checkins mailing list -- [email protected] To unsubscribe send an email to [email protected] https://mail.python.org/mailman3//lists/python-checkins.python.org Member address: [email protected]
