Description

DinoV

opened on Aug 4, 2026

Issue body actions

Bug report

Bug description:

lazy import math.pi
print(math.pi)

as reported: https://discuss.python.org/t/sys-lazy-modules-clarification/108385

This is a big difference in that we allow these in lazy imports but not normal imports. It's also due to just a bunch of extra unnecessary logic. Fixing this now seems like it'd be better than letting people start doing this.

CPython versions tested on:

3.15

Operating systems tested on:

Linux

Linked PRs

• gh-155194: Fix not raising on non-module import #155189
• [3.15] gh-155194: Fix not raising on non-module import #155188
• [3.15] gh-155194: Fix not raising on non-module import (GH-155189) #155983

Activity

1. DinoV

   added

   type-bugAn unexpected behavior, bug, or errorAn unexpected behavior, bug, or error

   on Aug 4, 2026
2. DinoV

   self-assigned this

   on Aug 4, 2026
3. StanFromIreland

   added

   interpreter-core(Objects, Python, Grammar, and Parser dirs)(Objects, Python, Grammar, and Parser dirs)

   topic-lazy-imports

   3.15bugs and security fixesbugs and security fixes

   3.16new features, bugs and security fixesnew features, bugs and security fixes

   on Aug 5, 2026
4. encukou commented on Aug 11, 2026

   

   encukou

   on Aug 11, 2026

   Member

   More actions

   Hugo said:

   Yes, let's fix this for rc2, and do it in main first.

   I'll mark this as a release blocker for visibility.

   Reacted by Dino Viehland and Terry Jan Reedy
5. encukou

   added

   release-blocker

   on Aug 11, 2026
6. github-project-automation

   added this to Release and Deferred blockers 🚫on Aug 11, 2026
7. github-project-automation

   moved this to Todo in Release and Deferred blockers 🚫on Aug 11, 2026
8. DinoV

   added a commit that references this issue on Aug 14, 2026

   gh-155194: Fix not raising on non-module import (#155189)

   dffac61
9. pablogsal

   added a commit that references this issue on Aug 19, 2026

   [3.15] gh-155194: Fix not raising on non-module import (GH-155189) (#…

   e531dd4
10. encukou commented on Aug 21, 2026

    

    encukou

    on Aug 21, 2026

    Member

    More actions

    Thank you for the fix!
11. encukou

    closed this as completedon Aug 21, 2026
12. github-project-automation

    moved this from Todo to Done in Release and Deferred blockers 🚫on Aug 21, 2026
13. brittanyrey

    added 2 commits that reference this issue on Sep 18, 2026

    Import a lazy submodule that a package attribute shadows

    00da645

    Import a lazy submodule that a package attribute shadows

    2b0aa85
14. StanFromIreland

    marked test_concurrent_lazy_import_reification is flaky #154561 as a duplicate of this issue on Sep 18, 2026

Issue actions