This should work for you. Follow these simple steps.
First, let's remove the pip which is already installed so it won't cause any error.
Open Terminal.
Type: sudo apt-get remove python-pip
It removes pip that is already installed.
Method-1
Step: 1 sudo easy_install -U pip
It will install pip latest version.
And will return its address: Installed /usr/local/lib/python2.7/dist-packages/pip-6.1.1-py2.7.egg
or
Method-2
Step: 1 go to this link.
Step: 2 Right click >> Save as.. with name get-pip.py .
Step: 3 use: cd to go to the same directory as your get-pip.py file
Step: 4 use: sudo python get-pip.py
It will install pip latest version.
or
Method-3
Step: 1 use: sudo apt-get install python-pip
It will install pip latest version.