Traceback (most recent call last):


 "/home/user/.venvpylocal37/bin/pip", line 5, in <module>

from pip._internal.cli.main import main


 "/home/user/.venvpylocal37/lib/python3.7/site-packages/pip/_internal/cli/main.py", line 10, in <module>

from pip._internal.cli.autocompletion import autocomplete


 "/home/user/.venvpylocal37/lib/python3.7/site-packages/pip/_internal/cli/autocompletion.py", line 9, in <module>

from pip._internal.cli.main_parser import create_main_parser


 "/home/user/.venvpylocal37/lib/python3.7/site-packages/pip/_internal/cli/main_parser.py", line 7, in <module>

from pip._internal.cli import cmdoptions


 "/home/user/.venvpylocal37/lib/python3.7/site-packages/pip/_internal/cli/cmdoptions.py", line 24, in <module>

from pip._internal.cli.progress_bars import BAR_TYPES


 "/home/user/.venvpylocal37/lib/python3.7/site-packages/pip/_internal/cli/progress_bars.py", line 7, in <module>

from pip._vendor import six
ImportError: cannot import name 'six' from 'pip._vendor' (/home/user/.venvpylocal37/lib/python3.7/site-packages/pip/_vendor/__init__.py)

Traceback (most recent call last):


 "/usr/lib/python3.8/site-packages/musicbrainzngs/musicbrainz.py", line 497, in _safe_read

f = opener.open(req)


 "/usr/lib/python3.8/urllib/request.py", line 531, in open

response = meth(req, response)


 "/usr/lib/python3.8/urllib/request.py", line 640, in http_response

response = self.parent.error(


 "/usr/lib/python3.8/urllib/request.py", line 569, in error

return self._call_chain(*args)


 "/usr/lib/python3.8/urllib/request.py", line 502, in _call_chain

result = func(*args)


 "/usr/lib/python3.8/urllib/request.py", line 649, in http_error_default

raise HTTPError(req.full_url, code, msg, hdrs, fp)
urllib.error.HTTPError: HTTP Error 400: Bad Request
