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GeezerVison is showing github.com — gh-146609: Add colour to `timeit` CLI output by hugovk · Pull Request #146610 · python/cpython

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@hugovk

@hugovk hugovk commented Mar 29, 2026 •
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Standard and verbose:

./python.exe -m timeit "'-'.join(str(n) for n in range(100))"
./python.exe -m timeit --verbose "'-'.join(str(n) for n in range(100))"
image

With a warning:

./python.exe -m timeit "import time, random; time.sleep(random.random() * 0.9)"
image

As usual, environment variables can control colour output.

  • Issue: Add colour to timeit CLI output #146609

📚 Documentation preview 📚: https://cpython-previews--146610.org.readthedocs.build/

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hugovk added 3 commits March 28, 2026 19:29
@hugovk
Add colour to timeit CLI output
2d4380c
@hugovk
Only calculate 'best = min(timings)' once
0f800b3
@hugovk
What's New and blurb
28e8af9
@hugovk
hugovk requested a review from AA-Turner as a code owner March 29, 2026 18:33
@bedevere-app bedevere-app Bot added the awaiting core review label Mar 29, 2026
@bedevere-app bedevere-app Bot mentioned this pull request Mar 29, 2026
Add colour to timeit CLI output #146609
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StanFromIreland
StanFromIreland reviewed Mar 31, 2026
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Comment thread Lib/test/test_timeit.py Resolved

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Comment thread Lib/timeit.py Resolved

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hugovk added 2 commits March 31, 2026 18:55
@hugovk
Avoid re-running duplicate tests
f6ef701
@hugovk
Simplify warning colours
ff4c493
StanFromIreland
StanFromIreland reviewed Mar 31, 2026
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Comment thread Lib/timeit.py Resolved

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Comment thread Lib/test/test_timeit.py Resolved

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hugovk and others added 3 commits March 31, 2026 20:12
@hugovk @StanFromIreland
Adjust spacing
7e75e56 
Co-authored-by: Stan Ulbrych <[email protected]>
@hugovk
Fix space in tests
9636021
@hugovk
Merge branch 'main' into 3.15-timeit-colour
10b19ad
StanFromIreland
StanFromIreland approved these changes Apr 7, 2026
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@bedevere-app bedevere-app Bot added awaiting merge and removed awaiting core review labels Apr 7, 2026
@ambv

ambv commented Apr 7, 2026

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Nitpick: I would segment this differently. The fact that the entire line after "raw times:" is just cyan is a wasted opportunity. Would make sense to me to make the commas delimiting the values be colored the same way as the arrows.
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@hugovk
Use same colour for raw time commas as arrows
9aa8629
@hugovk

hugovk commented Apr 7, 2026

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Like this?

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@ambv

ambv commented Apr 8, 2026

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Yes, that looks better to me!
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@hugovk
hugovk merged commit 8687b9d into python:main Apr 8, 2026
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@hugovk
hugovk deleted the 3.15-timeit-colour branch April 8, 2026 13:18
@bedevere-app bedevere-app Bot removed the awaiting merge label Apr 8, 2026
@hugovk

hugovk commented Apr 8, 2026

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Thanks both for the reviews!
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ljfp pushed a commit to ljfp/cpython that referenced this pull request Apr 25, 2026
@hugovk @StanFromIreland @ljfp
pythongh-146609: Add colour to timeit CLI output (python#146610)
174508f 
Co-authored-by: Stan Ulbrych <[email protected]>
@hugovk hugovk mentioned this pull request May 3, 2026
gh-146609: Use argparse for colour help timeit CLI #149334
Merged
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@StanFromIreland StanFromIreland StanFromIreland approved these changes
@AA-Turner AA-Turner Awaiting requested review from AA-Turner AA-Turner is a code owner

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4 participants

@hugovk @ambv @bedevere-bot @StanFromIreland
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