python3 -m venv venv(ou python si votre python3 est python)
ou\
virtualenv -p python3 venv
source venv/bin/activatecd venv/Scripts
activate.bat
cd ../..pip3 install -r requirements.txt``̀ FLASK_APP="app" DATABASE_URL="sqlite:///db.db" flask db create
FLASK_APP="app" DATABASE_URL="sqlite:///db.db?check_same_thread=False" flask run