db_engine = sa.create_engine('sqlite:///db.sqlite') metadata = sa.MetaData() # Mapping Objects class (): def __init__(self , ): self. = def __repr__(self): return "< ( '%s' , )>" % ( self. , ) # Declare mappings mapper( , _table) # Create a session session = sessionmaker(bind=db_engine) # Table definition - # _table = sa.Table(" ", metadata, ) sa.Column(' ' , nullable=True , autoincrement=True , primary_key=True ) , , , length= , sa.ForeignKey(" . ") # -