sample scripts and outputs for virtualenvwrapper in Ubuntu

basic-virtualenvwrapper-ubuntu.sh

sudo apt install virtualenv
sudo apt install virtualenvwrapper

# if workon does not work, try restarting the terminal
workon  # no existing virtual environments (c.f. lsvirtualenv)
mkvirtualenv --python=$(which python) myfirst  # init Python 2 virtualenv
#New python executable in /home/don/.virtualenvs/myfirst/bin/python
#Installing setuptools, pip, wheel...done.

# === (myfirst) $ prompt begins
pip list  # check it is empty
#DEPRECATION: ...
#pip (9.0.1)
#setuptools (36.5.0)
#wheel (0.30.0)
deactivate  # exit
# === (myfirst) $ prompt ends

mkvirtualenv --python=$(which python3) myfirst-py3  # init Python 3 virtualenv

# === (myfirst-py3) $ prompt begins
pip list
#DEPRECATION: ...
#pip (9.0.1)
#setuptools (36.5.0)
#wheel (0.30.0)
workon myfirst  # switch
# === (myfirst-py3) $ prompt ends
# === (myfirst) $ prompt begins
add2virtualenv .  # add path
#Warning: Converting "." to "/home/don"
add2virtualenv  # confirm the added path
#Usage: add2virtualenv dir [dir ...]
#
#Existing paths:
#/home/don
add2virtualenv -d .  # remove path
#Warning: Converting "." to "/home/don"
add2virtualenv  # check empty again
#Usage: add2virtualenv dir [dir ...]
#
#Existing paths:
deactivate
# === (myfirst) $ prompt ends

workon  # show the list of available virtualenvs c.f., lsvirtualenv
#myfirst
#myfirst-py3
rmvirtualenv $(workon)  # remove all virtualenvs
#Removing myfirst...
#Removing myfirst-py3...