[python] pip cannot install anything

It's because in the pip configuration the index-url parameter should point to the new pypi url. Change the file in ~/.pip/pip.conf or if you are running pip as root, in: /root/.pip/pip.conf.

Probably you have this:

 [global]
 index-url=http://f.pypi.python.org/simple

You shoudl change it for this:

  [global]
  index-url=https://pypi.python.org/pypi/

And then all should work as before. I hope it helps you.