text: import sqlalchemy as db
  import sqlalchemy.orm as orm
  
  ENGINE_URI = "sqlite:///market_data_loader.db"
  
  
  def create_engine():
      return db.create_engine(ENGINE_URI)
  
  
  def create_sessionmaker():
      engine = create_engine()
      return orm.sessionmaker(bind=engine, expire_on_commit=False)
  