1. python3 -m pip install virtualenv # only one - done
  2. python3 -m venv venv0 # each time venv0 not exists
  3. source venv0/bin/activate # each time you start work with new terminal
  4. python3 -m pip install -r requirements.txt # each time after venv0 creation (after step 2)
  5. python3 main.py # run program

GIT GUT