Public bug reported:

python3-pandas needs certain packages which are not listed among its 
dependencies, even as suggests, and are not available in Ubuntu.  I ran into 
this while using feather.  Here's a debug session; earlier import pandas as pd 
we executed.
(Pdb) c
> /usr/local/fahydev/Kornak/bifs/examples/investigate09.py(59)<module>()
-> subsample = pd.read_feather(SUBFILE).astype({"id": int})
(Pdb) n
ImportError: Missing optional dependency 'pyarrow'.  Use pip or conda to 
install pyarrow.

The removal of support for feather and the absence of a suitable package
is noted in the changelog for 0.25.2+dfsg-1.

apache provides packaging and instructions upstream, but it would be
really nice if this just worked.

Note that python3-arrow, an existing Ubuntu package, has absolutely
nothing to do with the pyarrow library.

Desired Outcome:
pyarrow packaged like other python libraries.
The relevant package listed as a dependency of python3-pandas (I'd be fine with 
recommends though suggests would do).

In case the info I uploaded didn't get through, this is on Ubuntu 20.04
with python3-pandas 0.25.3+dfsg-7

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: python3-pandas 0.25.3+dfsg-7
ProcVersionSignature: Ubuntu 5.4.0-1039.41-azure 5.4.78
Uname: Linux 5.4.0-1039-azure x86_64
ApportVersion: 2.20.11-0ubuntu27.16
Architecture: amd64
CasperMD5CheckResult: skip
Date: Wed Feb 17 16:01:02 2021
InstallationDate: Installed on 2020-10-02 (138 days ago)
InstallationMedia: Ubuntu-Server 18.04.5 LTS "Bionic Beaver" - Release amd64 
(20200810)
PackageArchitecture: all
ProcEnviron:
 TERM=screen
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: pandas
UpgradeStatus: Upgraded to focal on 2020-10-02 (138 days ago)

** Affects: pandas (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug focal

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https://bugs.launchpad.net/bugs/1915971

Title:
  pandas needs pyarrow, which doesn't exist

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