db.py

from flask_sqlalchemy import SQLAlchemy

BINDING_TO_DB = dict()


def init_binding_to_db_for_bindings(bindings):
    # Create a database for each binding
    for binding in bindings:
        db = SQLAlchemy()
        BINDING_TO_DB[binding] = db


def lookup_db_for_binding(binding):
    # PRE: db exists for given binding
    return BINDING_TO_DB[binding]


def init_all_dbs_with_app(flask_app):
    for db in BINDING_TO_DB.values():
        db.init_app(flask_app)