Install pip:
http://www.pip-installer.org/en/latest/installing.html

Summary:

download:
https://bitbucket.org/pypa/setuptools/raw/bootstrap/ez_setup.py
cd ~/Downloads
sudo python ez_setup.py

download:
https://raw.github.com/pypa/pip/master/contrib/get-pip.py
sudo python get-pip.py

not sure how to make pip download packages for later installation