web_server.py 文件源码

def get_shakemaps():
    session = Session()
    sms = (session.query(ShakeMap)
                .order_by(ShakeMap.recieve_timestamp.desc())
                .all())

    sm_dicts = []
    for sm in sms:
        sm_dict = sm.__dict__.copy()
        sm_dict.pop('_sa_instance_state', None)
        sm_dicts += [sm_dict]

    sm_json = json.dumps(sm_dicts, cls=AlchemyEncoder)

    Session.remove()    
    return sm_json