Bug#973589: pandas: please temporarily drop the build-dependency on python3-numba

[Graham Inggs]

Source: pandas
Version: 1.1.3+dfsg-2


Hi Maintainer

Pandas has a build-dependency on python3-numba which currently FTBFS
with Python 3.9 [1] and is RFA [2].  This blocks the migration of
python3-defaults with Python 3.9 as a supported version.  Please
temporarily drop the build-dependency on python3-numba until it is
compatible with Python 3.9.

While the FTBFS on numba is RC, numba is not considered for
auto-removal as it is a 'key package' [3] in Debian due to the
following:

- reason: pandas build-depends python3-numba
  source: numba

- reason: matplotlib build-depends python3-pandas
  source: pandas

- reason: popcon *
  source: matplotlib

* packages with more than 5% of the total installations by popcon
(currently ~10k installations) are considered key packages and not
considered for auto-removal, and python3-matplotlib has ~13k [4].

Regards
Graham


[1] https://bugs.debian.org/972246
[2] https://bugs.debian.org/935626
[3] https://udd.debian.org/cgi-bin/key_packages.yaml.cgi
[4] https://qa.debian.org/popcon.php?package=matplotlib