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GeezerVison is showing github.com — gh-142956: Update `tomllib` to parse TOML 1.1.0 by hukkin · Pull Request #144243 · python/cpython

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@hukkin

@hukkin hukkin commented Jan 26, 2026 •
edited by github-actions Bot
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As per this discussion, this includes a commit that syncs cosmetic changes with Tomli (to reduce diff and make maintenance easier), so this is probably best reviewed by commit.

  • Issue: TOML 1.1 #142956

📚 Documentation preview 📚: https://cpython-previews--144243.org.readthedocs.build/

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hukkin added 7 commits January 25, 2026 21:09
@hukkin
tomllib: Add shorthand for escape character (TOML 1.1)
f8275d4
@hukkin
tomllib: Allow newlines and trailing comma in inline tables (TOML 1.1)
2342380
@hukkin
tomllib: Add \xHH Unicode escape code to basic strings (TOML 1.1)
880092f
@hukkin
tomllib: Make seconds optional in Date-Time and Time (TOML 1.1)
2199c58
@hukkin
tomllib: Sync with Tomli to reduce diff
329e049
@hukkin
Add NEWS
b586d43
@hukkin
Update docs
9ede2aa
@hukkin
hukkin requested review from encukou and hauntsaninja as code owners January 26, 2026 11:14
@python-cla-bot

python-cla-bot Bot commented Jan 26, 2026 •
edited
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@bedevere-app bedevere-app Bot added the awaiting review label Jan 26, 2026
@bedevere-app bedevere-app Bot mentioned this pull request Jan 26, 2026
TOML 1.1 #142956
Closed
@hukkin
Add new test data folder to Makefile's list
3ccb26f
@hukkin
hukkin requested review from AA-Turner, emmatyping and erlend-aasland as code owners January 26, 2026 11:30
encukou
encukou approved these changes Jan 26, 2026
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@encukou encukou left a comment

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Thank you! The changes are rather small, and match the spec updates as far as I can see; the cosmetic changes are indeed cosmetic.

I'll merge ~Friday is there are no objections, to give others a chance to review

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@bedevere-app bedevere-app Bot added awaiting merge and removed awaiting review labels Jan 26, 2026
StanFromIreland
StanFromIreland approved these changes Jan 26, 2026
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hauntsaninja
hauntsaninja approved these changes Jan 26, 2026
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vstinner
vstinner reviewed Jan 27, 2026
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Comment thread Doc/library/tomllib.rst Outdated
support writing TOML.

.. versionchanged:: next
Module updated to support TOML 1.1.0. Initially the module supported TOML 1.0.0.

@vstinner vstinner Jan 27, 2026

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Would it be possible to elaborate changes between TOML 1.0 and TOML 1.1? Maybe just give some examples.

I suggest to document this change in What's New in Python 3.15.

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@encukou encukou Jan 27, 2026

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That's a good point. I suggest:

  • Copying the first four points from TOML changelog to What's New (with attribution link)
  • Linking to the What's New entry from here. (In the long term, a changelog will be increasingly distracting.)

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@encukou encukou mentioned this pull request Jan 30, 2026
TOML 1.1.0: Add What's New entry with the changes hukkin/cpython#41
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@encukou

encukou commented Jan 30, 2026

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I've proposed a What's New entry as a PR to your branch: hukkin#41
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encukou and others added 2 commits January 30, 2026 20:52
@encukou @hukkin
Add What's New entry with the changes
576e495
@encukou @hukkin @StanFromIreland
Apply suggestions from code review
127645f 
Co-authored-by: Taneli Hukkinen <[email protected]>
Co-authored-by: Stan Ulbrych <[email protected]>
@encukou
encukou merged commit bb917d8 into python:main Feb 3, 2026
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@bedevere-app bedevere-app Bot removed the awaiting merge label Feb 3, 2026
Aniketsy pushed a commit to Aniketsy/cpython that referenced this pull request Feb 3, 2026
@hukkin @encukou
@StanFromIreland @Aniketsy
pythongh-142956: Update tomllib to parse TOML 1.1.0 (python#144243)
cc363d5 
Co-authored-by: Petr Viktorin <[email protected]>
Co-authored-by: Stan Ulbrych <[email protected]>
@hukkin
hukkin deleted the toml-1.1 branch February 3, 2026 19:31
thunder-coding pushed a commit to thunder-coding/cpython that referenced this pull request Feb 15, 2026
@hukkin @encukou
@StanFromIreland @thunder-coding
pythongh-142956: Update tomllib to parse TOML 1.1.0 (python#144243)
ddd4ca2 
Co-authored-by: Petr Viktorin <[email protected]>
Co-authored-by: Stan Ulbrych <[email protected]>
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Reviewers

@vstinner vstinner vstinner left review comments
@encukou encukou encukou approved these changes
@hauntsaninja hauntsaninja hauntsaninja approved these changes
@StanFromIreland StanFromIreland StanFromIreland approved these changes
@erlend-aasland erlend-aasland Awaiting requested review from erlend-aasland erlend-aasland is a code owner
@AA-Turner AA-Turner Awaiting requested review from AA-Turner AA-Turner is a code owner
@emmatyping emmatyping Awaiting requested review from emmatyping emmatyping is a code owner

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5 participants

@hukkin @encukou @vstinner @hauntsaninja @StanFromIreland
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