Python_Install python and pip [3.6]

1. Install Python3.6

$ sudo add-apt-repository ppa:jonathonf/python-3.6
$ sudo apt-get update
$ sudo apt-get install python3.6
$ sudo apt install python3.6-dev

2. Install PIP 3.6

First download the file: get-pip.py [source: https://bootstrap.pypa.io/get-pip.py]
$ sudo python3.6 get-pip.py

3. Install virualenv
$ pip install https://github.com/pypa/virtualenv/tarball/master

4. make python3.6 as the default [by using alias as below]

$ vim ~/.bashrc

[add these two lines]

alias python=python3.6
alias pip=pip3.6

once done, then quit vim and then do the source to activate
$ source ~/.bashrc