[Bug 1945661] Re: openstack commands fail with GTK3 error

[eblock@nde.ag]

Maybe my comments are invalid. It must have something to do with my VM
image where I'm testing all of this. When I removed a lot of packages
which I refer to openstack and then reinstalled only
python3-openstackclient it works as expected in W, X and Y releases. I
just didn't test the upgrade yet after cleaning up properly. Hopefully,
this won't be an issue during the actual upgrade of the baremetal nodes
as I'm not sure which package(s) exactly is (are) responsible for this
misconfiguration in my lab env.

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https://bugs.launchpad.net/bugs/1945661

Title:
  openstack commands fail with GTK3 error

Status in python-openstackclient package in Ubuntu:
  Confirmed

Bug description:
  Openstack release: Wallaby
  OS: Ubuntu 20.04 server edition
  After installation of python3-openstackclient from apt, while setting up user, roles and project, I executed following command: 
  openstack domain create --description "An Example Domain" example

  Error: 
  Traceback (most recent call last):
    File "/usr/bin/openstack", line 6, in <module>
      from openstackclient.shell import main
    File "/usr/lib/python3/dist-packages/openstackclient/shell.py", line 23, in <module>
      from osc_lib import shell
    File "/usr/lib/python3/dist-packages/osc_lib/shell.py", line 24, in <module>
      from cliff import app
    File "/usr/lib/python3/dist-packages/cliff/app.py", line 22, in <module>
      import cmd2
    File "/usr/lib/python3/dist-packages/cmd2.py", line 585, in <module>
      _ = pyperclip.paste()
    File "/usr/lib/python3/dist-packages/pyperclip/__init__.py", line 667, in lazy_load_stub_paste
      copy, paste = determine_clipboard()
    File "/usr/lib/python3/dist-packages/pyperclip/__init__.py", line 558, in determine_clipboard
      return init_gi_clipboard()
    File "/usr/lib/python3/dist-packages/pyperclip/__init__.py", line 167, in init_gi_clipboard
      gi.require_version('Gtk', '3.0')
    File "/usr/lib/python3/dist-packages/gi/__init__.py", line 129, in require_version
      raise ValueError('Namespace %s not available' % namespace)

  Had to install GTK3 to make openstack commands work but it is taking
  huge time to get a response to the commands. The wait time after
  firing any openstack cli command is around 30 seconds.

  Anybody faced the issue? What is the fix for it if it exists?

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