Bug#1013939: python-xarray: autopkgtest regression: Left and right DataArray objects are not close

[Paul Gevers]

Source: python-xarray
Version: 2022.06.0~rc1-1
Severity: serious
User: debian-ci at lists.debian.org
Usertags: regression

Dear maintainer(s),

With a recent upload of python-xarray the autopkgtest of python-xarray 
fails in testing when that autopkgtest is run with the binary packages 
of python-xarray from unstable. It passes when run with only packages 
from testing. In tabular form:

                        pass            fail
python-xarray          from testing    2022.06.0~rc1-1
all others             from testing    from testing

I copied some of the output at the bottom of this report.

Currently this regression is blocking the migration to testing [1]. Can 
you please investigate the situation and fix it?

More information about this bug and the reason for filing it can be found on
https://wiki.debian.org/ContinuousIntegration/RegressionEmailInformation

Paul

[1] https://qa.debian.org/excuses.php?package=python-xarray

https://ci.debian.net/data/autopkgtest/testing/amd64/p/python-xarray/23134419/log.gz

=================================== FAILURES 
===================================
___________________ test_weighted_operations_nonequal_coords 
___________________

     def test_weighted_operations_nonequal_coords():
         # There are no weights for a == 4, so that data point is ignored.
         weights = DataArray(np.random.randn(4), dims=("a",), 
coords=dict(a=[0, 1, 2, 3]))
         data = DataArray(np.random.randn(4), dims=("a",), 
coords=dict(a=[1, 2, 3, 4]))
         check_weighted_operations(data, weights, dim="a", skipna=None)
             q = 0.5
         result = data.weighted(weights).quantile(q, dim="a")
         # Expected value computed using code from 
https://aakinshin.net/posts/weighted-quantiles/ with values at a=1,2,3
         expected = DataArray([0.9308707], coords={"quantile": 
[q]}).squeeze()
>       assert_allclose(result, expected)
E       AssertionError: Left and right DataArray objects are not close
E       E       Differing values:
E       L
E           array(-0.289754)
E       R
E           array(0.930871)

/usr/lib/python3/dist-packages/xarray/tests/test_weighted.py:667: 
AssertionError
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