How to install virtualenv and virtualenvwrapper

virtualenv.md

Install virtualenv and virtualenvwrapper

Install both packages:

sudo apt install virtualenvwrapper
sudo apt install virtualenv

(recomended if have multiple apps running on different enviroments)

$ pip3 install virtualenv 
$ pip3 install virtualenvwrapper

$ mkdir ~/.virtualenvs

Add these lines to the end of ~/.bashrc so that the virtualenvwrapper commands are loaded.

    export WORKON_HOME=~/.virtualenvs
    . /usr/local/bin/virtualenvwrapper.sh

Exit and re-open your shell, or reload .bashrc with the command

source ~/.bashrc

Virtualenvwrapper is a utility on top of virtualenv that adds a bunch of utilities that allow the environment folders to be created at a single place, instead of spreading around everywhere.

Create a virtual envirioment to work under:

$ mkvirtualenv codebench 

See Virtualenvwrapper on Ubuntu for more details.

Virtualenvwrapper commands

lsvirtualenv
mkvirtualenv [mkvirtualenv-options] [virtualenv-options] <name>
    [mkvirtualenv-options]
    -h  Print help text.
workon [<name>]
deactivate
rmvirtualenv <name>

Setup a new virtualenv with python3

$ mkvirtualenv --python=/usr/bin/python3 <env name>

Windows

https://github.com/davidmarble/virtualenvwrapper-win

pip install virtualenvwrapper-win

At this stage virtualenvwrapper commands should work in cmd, but not in git bash.

https://www.tumblingprogrammer.com/setting-up-windows-for-python-development-python-2-python-3-git-bash-terminal-and-virtual-environments/

echo "source virtualenvwrapper.sh" >> ~/.bashrc
source ~/.bashrc

Now it should work in both, but the default environment lists are stored in different files, so lsvirtualenv would show different results.