"pip3 debug" fails due to now-fixed upstream bug

[Brian Turek]

In Focal, the command "pip3 debug" fails with the following output:

$ pip3 debug
Traceback (most recent call last):
  File "/usr/bin/pip3", line 11, in <module>
    load_entry_point('pip==20.0.2', 'console_scripts', 'pip3')()
  File "/usr/lib/python3/dist-packages/pip/_internal/cli/main.py", line 73, in main
    command = create_command(cmd_name, isolated=("--isolated" in cmd_args))
  File "/usr/lib/python3/dist-packages/pip/_internal/commands/__init__.py", line 96, in create_command
    module = importlib.import_module(module_path)
  File "/usr/lib/python3.8/importlib/__init__.py", line 127, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
  File "<frozen importlib._bootstrap>", line 1014, in _gcd_import
  File "<frozen importlib._bootstrap>", line 991, in _find_and_load
  File "<frozen importlib._bootstrap>", line 975, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 671, in _load_unlocked
  File "<frozen importlib._bootstrap_external>", line 783, in exec_module
  File "<frozen importlib._bootstrap>", line 219, in _call_with_frames_removed
  File "/usr/lib/python3/dist-packages/pip/_internal/commands/debug.py", line 11, in <module>
    from pip._vendor.certifi import where
ModuleNotFoundError: No module named 'pip._vendor.certifi'

This appears to be the exact problem that has been fixed upstream in Debian: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=958396

Requested info:
$ lsb_release -rd
Description: Ubuntu 20.04.1 LTS
Release: 20.04

$ apt-cache policy python3-pip
python3-pip:
  Installed: 20.0.2-5ubuntu1
  Candidate: 20.0.2-5ubuntu1
  Version table:
 *** 20.0.2-5ubuntu1 500
        500 http://gb.archive.ubuntu.com/ubuntu focal/universe amd64 Packages
        100 /var/lib/dpkg/status

[Kai Kasurinen (kai-kasurinen)]

Fixed in version python-pip/20.1-1

Thank you for taking the time to report this bug and helping to make Ubuntu better. However, I am closing it because the bug has been fixed in the latest development version of Ubuntu.