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The asyncio REPL reaches for PYTHONSTARTUP in isolated mode #140648

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The asyncio REPL reaches for PYTHONSTARTUP in isolated mode#140648
Labels
3.13only security fixes3.14bugs and security fixes3.15bugs and security fixesstdlibStandard Library Python modules in the Lib/ directorytopic-asynciotopic-replRelated to the interactive shelltype-bugAn unexpected behavior, bug, or error

Description

@johnslavik
johnslavik
opened on Oct 27, 2025

Bug report

Bug description:

https://docs.python.org/3/using/cmdline.html#cmdoption-I

Current:

$ PYTHONSTARTUP=<(echo 'print("you should not be seeing this!")') ./python -Iqm asyncio
you should not be seeing this!
>>> import asyncio
>>>

Expected:

$ PYTHONSTARTUP=<(echo 'print("you should not be seeing this!")') ./python -Iqm asyncio
>>> import asyncio
>>>

CPython versions tested on:

CPython main branch

Operating systems tested on:

Linux

Linked PRs

Activity

  1. johnslavik
    added
    type-bugAn unexpected behavior, bug, or error
    on Oct 27, 2025

  2. johnslavik commented on Oct 27, 2025

    @johnslavik
    johnslavik
    on Oct 27, 2025
    MemberAuthor

    @ZeroIntensity (mentorship) labels: stdlib, topic-asyncio, topic-repl, 3.13, 3.14.

  3. ZeroIntensity
    added
    topic-asyncio
    stdlibStandard Library Python modules in the Lib/ directory
    topic-replRelated to the interactive shell
    on Oct 27, 2025
  4. github-project-automation
    added this to asyncioon Oct 27, 2025
  5. github-project-automation
    moved this to Todo in asyncioon Oct 27, 2025
  6. ZeroIntensity
    added
    3.13only security fixes
    3.14bugs and security fixes
    on Oct 27, 2025

  7. ZeroIntensity commented on Oct 27, 2025

    @ZeroIntensity
    ZeroIntensity
    on Oct 27, 2025
    Member

    Do you want the 3.15 label too?

  8. johnslavik commented on Oct 27, 2025

    @johnslavik
    johnslavik
    on Oct 27, 2025
    MemberAuthor

    Do you want the 3.15 label too?

    Yes! Missed that. Thanks :-)

  9. efimov-mikhail
    added
    3.15bugs and security fixes
    on Oct 27, 2025
  10. kumaraditya303
    added a commit that references this issue on Jan 3, 2026

    gh-140648: Make asyncio REPL respect the `-I` flag (isolated mode) (#…

    e7c542d
  11. miss-islington
    added 2 commits that reference this issue on Jan 3, 2026

    pythongh-140648: Make asyncio REPL respect the `-I` flag (isolated mo…

    5364e7d

    pythongh-140648: Make asyncio REPL respect the `-I` flag (isolated mo…

    ac96226
  12. kumaraditya303
    added 2 commits that reference this issue on Jan 3, 2026

    [3.13] gh-140648: Make asyncio REPL respect the `-I` flag (isolated m…

    dced1a7

    [3.14] gh-140648: Make asyncio REPL respect the `-I` flag (isolated m…

    6610832
  13. kumaraditya303
    closed this as completedon Jan 3, 2026
  14. github-project-automation
    moved this from Todo to Done in asyncioon Jan 3, 2026
  15. thunder-coding
    added a commit that references this issue on Feb 15, 2026

    pythongh-140648: Make asyncio REPL respect the `-I` flag (isolated mo…

    653768a
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    3.13only security fixes3.14bugs and security fixes3.15bugs and security fixesstdlibStandard Library Python modules in the Lib/ directorytopic-asynciotopic-replRelated to the interactive shelltype-bugAn unexpected behavior, bug, or error

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