Use '...' in SetWrapper.__str__  when db_session is over (e.g. StudentSet([...]))
Use '...' in SetWrapper.__str__  when db_session is over (e.g. StudentSet([...]))

ponyorm/pony,gwecho/pony,gwecho/pony,ponyorm/pony,gwecho/pony,ponyorm/pony,ponyorm/pony