# must have virtualenv installed, if not: sudo pip3 install virtualenv # create virtualenv virtualenv venv -p python3 # macOS: virtualenv venv -p /usr/local/Cellar/python@3.7/3.7.9_2/bin/python3.7 # activate venv source venv/bin/active # or activate.fish # install dependancies pip install -r requirements.txt # dump dependancies pip freeze > requirements.txt # to exit deactivate