Often, your network consists of network devices that do not change a lot once put into production. For example, you would have core devices, distribution devices, spine, leaf, top-of-rack switches, and so on. Each of the devices would have certain characteristics and features that you would like to keep in a persistent location so that you can easily retrieve them later on. This is often done in terms of storing data in a database. However, you would not normally want to give other users, who might want this information, direct access to the database; nor do they want to learn all the complex SQL query language. For this case, we can leverage Flask and the Flask-SQLAlchemy extension of Flask.
You can learn more about Flask-SQLAlchemy at http://flask-sqlalchemy.pocoo.org/2.1/.
