How to solve the Pip install fails with “connection error: [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed (_ssl.c:598)” ?

   Use this –trusted-host method:

pip install --trusted-host pypi.python.org linkchecker

Try this code:

pip install --trusted-host files.pythonhosted.org --trusted-host pypi.org --trusted-host pypi.python.org oauthlib -vvv

Try to install pip 1.2.1 with easy_install and upgraded to new version of pip (6.0.7 at the time) which is able to install the  packages :

easy_install pip==1.2.1

pip install --upgrade pip