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[BUG]: create_violin() failure with numpy==2.4.0: TypeError: percentile() got an unexpected keyword argument 'interpolation' #5461
Description
Description
The TestViolin.test_violin_fig reveals that the create_violin() function is failing against numpy==2.4.0. It passes after downgrading to <2.4.0.
========================================================= test session starts =========================================================
platform linux -- Python 3.12.12, pytest-9.0.2, pluggy-1.6.0
rootdir: /tmp/plotly.py
configfile: pyproject.toml
plugins: anyio-4.12.1, typeguard-4.4.4, timeout-2.4.0
collected 1 item
tests/test_optional/test_figure_factory/test_figure_factory.py F [100%]
============================================================== FAILURES ===============================================================
_____________________________________________________ TestViolin.test_violin_fig ______________________________________________________
self = <tests.test_optional.test_figure_factory.test_figure_factory.TestViolin testMethod=test_violin_fig>
def test_violin_fig(self):
# check: test violin fig matches expected fig
> test_violin = ff.create_violin(data=[1, 2])
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
tests/test_optional/test_figure_factory/test_figure_factory.py:2313:
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
plotly/figure_factory/_violin.py:603: in create_violin
plot_data, plot_xrange = violinplot(
plotly/figure_factory/_violin.py:163: in violinplot
vals_min = calc_stats(vals)["min"]
^^^^^^^^^^^^^^^^
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
data = array([1., 2.])
def calc_stats(data):
"""
Calculate statistics for use in violin plot.
"""
x = np.asarray(data, float)
vals_min = np.min(x)
vals_max = np.max(x)
> q2 = np.percentile(x, 50, interpolation="linear")
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
E TypeError: percentile() got an unexpected keyword argument 'interpolation'
plotly/figure_factory/_violin.py:20: TypeError
======================================================= short test summary info =======================================================
FAILED tests/test_optional/test_figure_factory/test_figure_factory.py::TestViolin::test_violin_fig - TypeError: percentile() got an unexpected keyword argument 'interpolation'
========================================================== 1 failed in 2.99s ==========================================================Steps to reproduce
uv venv -p 3.12
uv pip install -e .[dev]
.venv/bin/pytest tests/test_optional/test_figure_factory/test_figure_factory.py::TestViolin::test_violin_fig
Activity
[-][BUG]: `create_violin()` failure with `numpy==2.24.0`[/-][+][BUG]: `create_violin()` failure with `numpy==2.24.0`: `TypeError: percentile() got an unexpected keyword argument 'interpolation'`[/+]robertclaus commentedon Jan 14, 2026
@mgorny thank you for calling this out. Is this currently blocking you?
We absolutely welcome pull requests for issues like this!
[-][BUG]: `create_violin()` failure with `numpy==2.24.0`: `TypeError: percentile() got an unexpected keyword argument 'interpolation'`[/-][+][BUG]: `create_violin()` failure with `numpy==2.4.0`: `TypeError: percentile() got an unexpected keyword argument 'interpolation'`[/+]mgorny commentedon Jan 14, 2026
Not really, I've just skipped the failing tests in Gentoo for now.
AJSTYLE-lab commentedon Jan 15, 2026
Hi 👋
I’m interested in working on this issue and would be happy to submit a fix for the
numpy==2.4.0incompatibility increate_violin().If no one is currently working on it, I’ll start investigating and open a PR soon. Please let me know if there are any preferences or related context I should be aware of before proceeding.
Thanks!
AJSTYLE-lab commentedon Jan 15, 2026
I found this issue interesting so I have started working on it.
Fix violin plot compatibility with NumPy 2.4+
Fix create_violin() numpy 2.0+ compatibility
Fix create_violin() numpy 2.0+ compatibility