code: def initialize_connections(self, scopefunc=None):
          
          for connection_name, connection_string in\
                  self.app.config['FLASK_PHILO_SQLALCHEMY'].items():
              engine = create_engine(connection_string)
              session = scoped_session(sessionmaker(), scopefunc=scopefunc)
              session.configure(bind=engine)
              self.connections[connection_name] = Connection(engine, session)
docs: Initialize a database connection by each connection string
          defined in the configuration file