db_url = 'http://47.93.89.99:8765'

from traceback import format_excimport phoenixdb as pbclass Utils(object):    def get_db_conn(self, url):        """        this function is able to get database connection        :param url: Database url        :return: database connection        """        try:            _conn = pb.connect(url, autocommit=True)            cr = _conn.cursor()            print('get connection success....')            return cr, _conn        except:            try:                _conn = pb.connect(url, autocommit=True)                cr = _conn.cursor()                return cr, _conn            except:                cr = 'err'                _conn = format_exc()        return cr, _conn