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test_attribute_completion fails because of a lazy internal import #155727

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test_attribute_completion fails because of a lazy internal import#155727
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3.15bugs and security fixes3.16new features, bugs and security fixestestsTests in the Lib/test dirtype-bugAn unexpected behavior, bug, or error

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@serhiy-storchaka
serhiy-storchaka
opened on Aug 13, 2026

Bug report

Reader.run_hooks() imports _pyrepl._threading_handler on the first call if threading is already imported.

TestPyReplModuleCompleter.test_attribute_completion collects the modules imported while the reader runs and compares them with the modules the completer is expected to import, so all 17 subtests fail:

AssertionError: Items in the first set but not the second:
'_pyrepl._threading_handler'

./python -m unittest test.test_pyrepl.test_pyrepl.TestPyReplModuleCompleter.test_attribute_completion

Importing _pyrepl._threading_handler before running the test makes it pass.

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  1. serhiy-storchaka
    added
    type-bugAn unexpected behavior, bug, or error
    testsTests in the Lib/test dir
    3.15bugs and security fixes
    3.16new features, bugs and security fixes
    on Aug 13, 2026
  2. serhiy-storchaka
    added a commit that references this issue on Aug 14, 2026

    gh-155727: Ignore internal imports in test_attribute_completion (GH-1…

    94c6066
  3. serhiy-storchaka
    closed this as completedon Aug 14, 2026
  4. mbeijen
    added a commit that references this issue on Aug 14, 2026

    pythongh-155727: Ignore internal imports in test_attribute_completion (…

    b74b9e6
  5. hugovk
    added a commit that references this issue on Aug 27, 2026

    [3.15] gh-155727: Ignore internal imports in test_attribute_completion (

    a8e716a
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    3.15bugs and security fixes3.16new features, bugs and security fixestestsTests in the Lib/test dirtype-bugAn unexpected behavior, bug, or error

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