Comment 10 for bug 1849374

The python-xarray version in -proposed appears to already have these fixes, but it's instead broken because it expects a newer dask (test_dask), and on arm*, by long-standing numpy bug https://bugs.debian.org/877754 (test_datetime_reduce).

The dask version in -proposed appears to fix its pandas 0.25 issues but be broken by pytest 4: it's apparently trying to write to a temporary directory that doesn't exist (test_rearrange + test_temporary_directory).

This suggests the solution to these two is:
- point dask test_rearrange + test_temporary_directory to somewhere that does exist (and is writable by tests)
- xfail python-xarray test_datetime_reduce
- attempt pandas + dask + python-xarray together

snakemake hang: would it be worth retrying this to check if it always hangs / if it's always the same test?

python-feather-format: has a patch in https://bugs.debian.org/943925, but note that the Breaks: ends with the next upload to *Debian*, not solely to Ubuntu