Creates a python3 virtual environment and install any dependencies if the requirements.txt is found in the directory from which it is being executed.

pyautotest.sh

#!/usr/bin/env bash
# it won't stay in the virtual env so you will
# have to activate the environment by hand:
#
# source venv/bin/activate

python3 -m venv venv
source venv/bin/activate

if [ -f "requirements.txt" ]; then
    pip install -r requirements.txt
fi