I use Python 3.x on Windows 7 64 bit in an environment without full control of inbound/outbound traffic processing. Up till this week I\'ve been able to use the --trus
--trus
What ended up working for me is to add all the domains that are part of the new pypi routing.
pip install --trusted-host pypi.org --trusted-host pypi.python.org --trusted-host files.pythonhosted.org
Which can also be setup in a pip.ini file.