install pip for python2 code example

Example 1: install pip3

sudo apt install python3-pip

Example 2: pip install for python 2 and python3

$ curl -O https://bootstrap.pypa.io/get-pip.py
$ sudo python3.2 get-pip.py

Example 3: how to install pip ubuntu python2

sudo python2 get-pip.py

Example 4: how to install pip ubuntu python2

sudo add-apt-repository universe