Description of problem:
On Fedora's bpython I cannot import six.moves.urllib, so working interactively with fedora.client or bodhi.client is not possible

Version-Release number of selected component (if applicable):


How reproducible:
Always

Steps to Reproduce:
1. sudo dnf install bpython python3-{fedora,bodhi-client}
2. bpython
3. import six.moves.urllib
4. from fedora import client
5. from bodhi import client


Actual results:
```
~ 
❯ bpython
bpython version unknown on top of Python 3.9.0 /usr/bin/python3
>>> from fedora import client
Traceback (most recent call last):
  File "<input>", line 1, in <module>
    from fedora import client
  File "/usr/lib/python3.9/site-packages/fedora/client/__init__.py", line 157, in <module>
    from fedora.client.proxyclient import ProxyClient
  File "/usr/lib/python3.9/site-packages/fedora/client/proxyclient.py", line 39, in <module>
    from six.moves.urllib.parse import quote, urljoin, urlparse
ModuleNotFoundError: No module named 'six.moves.urllib'
>>> import six
>>> from six.moves import urllib
Traceback (most recent call last):
  File "<input>", line 1, in <module>
    from six.moves import urllib
  File "/usr/lib/python3.9/site-packages/six.py", line 92, in __get__
    result = self._resolve()
  File "/usr/lib/python3.9/site-packages/six.py", line 115, in _resolve
    return _import_module(self.mod)
  File "/usr/lib/python3.9/site-packages/six.py", line 82, in _import_module
    __import__(name)
ModuleNotFoundError: No module named 'six.moves.urllib'
>>> from bodhi import client
Traceback (most recent call last):
  File "<input>", line 1, in <module>
    from bodhi import client
  File "/usr/lib/python3.9/site-packages/bodhi/client/__init__.py", line 30, in <module>
    from fedora.client import AuthError, openidproxyclient
  File "/usr/lib/python3.9/site-packages/fedora/client/__init__.py", line 157, in <module>
    from fedora.client.proxyclient import ProxyClient
  File "/usr/lib/python3.9/site-packages/fedora/client/proxyclient.py", line 39, in <module>
    from six.moves.urllib.parse import quote, urljoin, urlparse
ModuleNotFoundError: No module named 'six.moves.urllib'
>>> 
```

Expected results:
These should succeed

Additional info:
The imports succeed using `python3`. It fails using bpython installed into a venv so it seems like an upstream issue.