vmenv

#################### virtualenv Installation ######################

$ sudo apt-get install python-setuptools python-dev build-essential
$ easy_install pip
$ sudo pip install virtualenv virtualenvwrapper

# Python3 (important)
$ sudo apt-get install python3-pip

# Add following lines to .bashrc
export WORKON_HOME=$HOME/.virtualenvs
source /usr/local/bin/virtualenvwrapper.sh
export PIP_VIRTUALENV_BASE=$WORKON_HOME

###################################################################

## Instruction ##
# Create virtualenv workspace
$ mkvirtualenv <working_dir>


# Remove virtualenv workspace
$ rmvirtualenv <virtualenv_name>
# (optional)
$ sudo rm -rf <virtualenv_name_dir>


# Deactivate current virtualenv
$ deactivate

# List or select working virtualenv dir
$ workon
$ workon <virtualenv_name>


# Install Python module (selected virtualenv)
$ pip install numpy
# OR
$ pip3 install numpy


# List installed Python modules
$ pip freeze
$ pip3 freeze



## NOTE ##
# "pip" is a command to donwload and install Python2-3.4 module
# while "pip3" is a command for Python3.5++

## References ##
# https://juacompe.wordpress.com/2013/02/25/how-to-install-virtualenv-and-virtualenvwrappe/
# https://dimamoroz.com/blog/2-python-virtual-environment-ubuntu/