Python 3 Working with Virtual Environments

pyenv.sh

# Virtualenv is a tool used to create an isolated Python environment. This environment has its own installation directories that doesn't share libraries with other virtualenv environments (and optionally doesn't access the globally installed libraries either).

# Ensure PYTHON3 is installed
python3 --version

# Create a virtual environment as follows
python3 -m venv ~/Pictolearn/venv        

# Activating a virtual environment which was created
source ~/Pictolearn/venv/bin/activate

# The above command should change the prompt to 
(venv) Pictolearn-MBP-2 flask-playground

# Deactivating the VM is
deactivate