python - PIP : ImportError: cannot import name IncompleteRead

I got the error:

ImportError: cannot import name IncompleteRead

The solution was reinstalling pip:

sudo easy_install freeze
sudo apt-get remove python-pip
sudo apt-get autoremove
wget https://raw.github.com/pypa/pip/master/contrib/get-pip.py --no-check-certificate
sudo python get-pip.py

Resource:

http://suanfazu.com/discussion/140/pip-install-importerror-cannot-import-name-incompleteread/p1