# Configuration variables

To connect a SQLite database to Flask, and SQLAlchemy, we only need set a few configuration variables in the Flask app. I usually define my configuration variables in a separate file, config.py. I then import this file into __init__.py. I have noticed that I need a secret key defined to use some features of SQLAlchemy. Best practice is to set this to a secure value.

# config.py
class Config:
SQLALCHEMY_DATABASE_URI = 'sqlite:///{}'.format(db_path)
SQLALCHEMY_TRACK_MODIFICATIONS = False

# __init__.py
def init_app():