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GeezerVison is showing github.com — Fix numpy 2.4.0 compatibility in create_violin() by Mr-Neutr0n · Pull Request #5483 · plotly/plotly.py

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@Mr-Neutr0n

@Mr-Neutr0n Mr-Neutr0n commented Feb 5, 2026

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Summary

Fixes #5461

The interpolation parameter was deprecated in numpy.percentile() and removed in numpy 2.4.0. It has been replaced with the method parameter which uses the same values.

Problem

create_violin() fails with numpy 2.4.0:

TypeError: percentile() got an unexpected keyword argument 'interpolation'

Solution

Changed all three np.percentile() calls in calc_stats() from using interpolation to method:

  • interpolation="linear" → method="linear"
  • interpolation="lower" → method="lower"
  • interpolation="higher" → method="higher"

Changes

Modified plotly/figure_factory/_violin.py:

# Before
q2 = np.percentile(x, 50, interpolation="linear")
q1 = np.percentile(x, 25, interpolation="lower")
q3 = np.percentile(x, 75, interpolation="higher")

# After
q2 = np.percentile(x, 50, method="linear")
q1 = np.percentile(x, 25, method="lower")
q3 = np.percentile(x, 75, method="higher")

Test plan

import plotly.figure_factory as ff
fig = ff.create_violin(data=[1, 2, 3, 4, 5])
fig.show()  # Should work without error

Or run the existing test:

pytest tests/test_optional/test_figure_factory/test_figure_factory.py::TestViolin::test_violin_fig

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@Mr-Neutr0n
Fix numpy 2.4.0 compatibility in create_violin()
b55ce9a 
Fixes #5461

The 'interpolation' parameter was deprecated in numpy.percentile() and
removed in numpy 2.4.0. It has been replaced with the 'method' parameter
which uses the same values.

Changed all three np.percentile() calls in calc_stats() from using
'interpolation' to 'method'.
@camdecoster camdecoster self-assigned this Feb 6, 2026
@camdecoster

camdecoster commented Feb 6, 2026

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Thank you for the PR. I'll take a look and follow up.
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camdecoster added 3 commits March 17, 2026 16:39
@camdecoster
Merge remote-tracking branch 'origin/main' into fix-numpy-percentile-…
2f239b2 
…issue-5461
@camdecoster
Add numpy minimum version
94ad286
@camdecoster
Update changelog
5f242ef
camdecoster
camdecoster approved these changes Mar 17, 2026
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@camdecoster camdecoster left a comment

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Looks good. I added a minimum version requirement for numpy and added a changelog entry. Thanks for your contribution!

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@camdecoster
Update uv lock file
12846fc
@camdecoster
camdecoster merged commit b009b25 into plotly:main Mar 18, 2026
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@camdecoster camdecoster mentioned this pull request Mar 18, 2026
Fix create_violin() TypeError with numpy >= 2.0 #5538
Closed
3 tasks
@camdecoster camdecoster mentioned this pull request Apr 8, 2026
Fix violin plot compatibility with NumPy 2.4+ #5505
Closed
2 of 5 tasks
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@camdecoster camdecoster camdecoster approved these changes

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Successfully merging this pull request may close these issues.

[BUG]: create_violin() failure with numpy==2.4.0: TypeError: percentile() got an unexpected keyword argument 'interpolation'

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2 participants

@Mr-Neutr0n @camdecoster
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