(...)
  File "C:\Users\RUNNER~1\AppData\Local\Temp\tmpf3wz854y\pip-21.2.3-py3-none-any.whl\pip\_internal\commands\install.py", line 14, in <module>
  File "C:\Users\RUNNER~1\AppData\Local\Temp\tmpf3wz854y\pip-21.2.3-py3-none-any.whl\pip\_internal\cli\req_command.py", line 21, in <module>
  File "C:\Users\RUNNER~1\AppData\Local\Temp\tmpf3wz854y\pip-21.2.3-py3-none-any.whl\pip\_internal\index\package_finder.py", line 32, in <module>
  File "C:\Users\RUNNER~1\AppData\Local\Temp\tmpf3wz854y\pip-21.2.3-py3-none-any.whl\pip\_internal\req\__init__.py", line 8, in <module>
  File "C:\Users\RUNNER~1\AppData\Local\Temp\tmpf3wz854y\pip-21.2.3-py3-none-any.whl\pip\_internal\req\req_install.py", line 35, in <module>
  File "C:\Users\RUNNER~1\AppData\Local\Temp\tmpf3wz854y\pip-21.2.3-py3-none-any.whl\pip\_internal\operations\install\wheel.py", line 38, in <module>
  File "C:\Users\RUNNER~1\AppData\Local\Temp\tmpf3wz854y\pip-21.2.3-py3-none-any.whl\pip\_vendor\distlib\scripts.py", line 14, in <module>
  File "C:\Users\RUNNER~1\AppData\Local\Temp\tmpf3wz854y\pip-21.2.3-py3-none-any.whl\pip\_vendor\distlib\compat.py", line 71, in <module>
ImportError: cannot import name 'splituser' from 'urllib.parse' (D:\a\cpython\cpython\lib\urllib\parse.py)

from supervisor.compat import urllib
...
type, uri = urllib.splittype(serverurl)
host, path = urllib.splithost(uri)
host, port = urllib.splitport(host)

# six.moves doesn't support star imports
if six.PY3:
    from urllib.request import *  # noqa for other modules to import
    from urllib.parse import *  # noqa for other modules to import
    from urllib.error import *  # noqa for other modules to import
else:
    from urllib import *  # noqa

if isinstance(url, six.string_types):
    try:               # python 2
        # http://pydoc.org/2.5.1/urllib.html
        host, selector = splithost(url)
        if host:
            user_passwd, host = splituser(host)
            host = unquote(host)
        realhost = host
    except NameError:  # python 3 has no splithost
        ...
else:
    host, selector = url
    urltype, rest = splittype(selector)
    url = rest
    user_passwd = None
    if urltype.lower() != 'http':
        realhost = None
    else:
        try:               # python 2
            realhost, rest = splithost(rest)
            if realhost:
                user_passwd, realhost = splituser(realhost)
                if user_passwd:
                    selector = "%s://%s%s" % (urltype, realhost, rest)
        except NameError:  # python 3 has no splithost
            ...