[Python-modules-team] Bug#964117: python3-pip: pip fails to list all outdated packages

[Vipul]

Package: python3-pip
Version: 18.1-5
Severity: normal

Dear Maintainer,

I'm was trying to list all outdated packages using `pip3 list
--outdated` command, but I'm getting following error message:

$ pip3 list --outdated
Exception:
Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/pip/_internal/cli/base_command.py", line 143, in main
    status = self.run(options, args)
  File "/usr/lib/python3/dist-packages/pip/_internal/commands/list.py", line 138, in run
    packages = self.get_outdated(packages, options)
  File "/usr/lib/python3/dist-packages/pip/_internal/commands/list.py", line 149, in get_outdated
    dist for dist in self.iter_packages_latest_infos(packages, options)
  File "/usr/lib/python3/dist-packages/pip/_internal/commands/list.py", line 150, in <listcomp>
    if dist.latest_version > dist.parsed_version
TypeError: '>' not supported between instances of 'Version' and 'Version'

I cannot reproduce this issue on latest version of pip (i.e. 20.1.1,
source https://pypa.org), but haven't tested it on Testing's (aka
Bullseye) pip3 package (i.e. 20.1.1). From error message it looks like
problem is in package itself.


-- System Information:
Debian Release: 10.4
  APT prefers stable-updates
  APT policy: (500, 'stable-updates'), (500, 'stable')
Architecture: amd64 (x86_64)

Versions of packages python3-pip depends on:
ii  ca-certificates    20200601~deb10u1
ii  python-pip-whl     18.1-5
ii  python3            3.7.3-1
ii  python3-distutils  3.7.3-1

Versions of packages python3-pip recommends:
ii  build-essential     12.6
ii  python3-dev         3.7.3-1
ii  python3-setuptools  40.8.0-1
ii  python3-wheel       0.32.3-2

python3-pip suggests no packages.

-- no debconf information