Bug#950743: satpy: autopkgtest failures

[Bas Couwenberg]

Source: satpy
Version: 0.19.1-1
Severity: serious
Justification: makes the package in question unusable or mostly so

Dear Maintainer,

The update of python3-xarray breaks autopkgtest:

 === python3.8 ===
 satpy (unittest.loader._FailedTest) ... ERROR
 
 ======================================================================
 ERROR: satpy (unittest.loader._FailedTest)
 ----------------------------------------------------------------------
 ImportError: Failed to import test module: satpy
 Traceback (most recent call last):
   File "/usr/lib/python3.8/unittest/loader.py", line 154, in loadTestsFromName
     module = __import__(module_name)
   File "/usr/lib/python3/dist-packages/satpy/__init__.py", line 53, in <module>
     from satpy.writers import available_writers  # noqa
   File "/usr/lib/python3/dist-packages/satpy/writers/__init__.py", line 29, in <module>
     import xarray as xr
   File "/usr/lib/python3/dist-packages/xarray/__init__.py", line 1, in <module>
     from . import testing, tutorial, ufuncs
   File "/usr/lib/python3/dist-packages/xarray/testing.py", line 7, in <module>
     from xarray.core import duck_array_ops, formatting
 ModuleNotFoundError: No module named 'xarray.core'
 
 
 ----------------------------------------------------------------------
 Ran 1 test in 0.000s

https://ci.debian.net/data/autopkgtest/testing/amd64/s/satpy/4199620/log.gz

Kind Regards,

Bas