Flask-Imp's main purpose is to help simplify the importing of blueprints, resources, and models. It has a few extra features built in to help with securing pages and password authentication.
https://flask-imp.readthedocs.io/en/latest/
Install in a virtual environment
pip install flask-imp
flask-imp init
Create a new project folder and navigate to it.
# Linux
cd /path/to/project-folder
# Windows
cd C:\path\to\project-folder
Linux / MacOS
python3 -m venv venv
source venv/bin/activate
Windows
python -m venv venv
.\venv\Scripts\activate