I am trying to use pip behind a proxy at work.
One of the answers from this post suggested using CNTLM. I installed and configured it per this other post, but runnin
I solved the problem with PIP in Windows using "Fiddler" (https://www.telerik.com/download/fiddler). After downloading and installing, do the following:
"Rules" => click "Automatically Authenticate"
Example: pip install virtualenv -proxy 127.0.0.1:8888
Just open your prompt and use.
https://github.com/pypa/pip/issues/1182 Search for "voltagex" (commented on 22 May 2015)