def __rollbackReceiver(self, app_id, txid, rootkey, keylist):
    print (app_id, txid, rootkey, keylist) % "rollback called. app=%s, txid=%s, rootkey=%s, keylist=%s"
    self.app_id = app_id
    self.txid = txid
    self.rootkey = rootkey
    self.keylist = keylist
dataset/ETHPy150Open AppScale/appscale/AppDB/test/functional/test_zktransaction.py/TestZKTransaction.__rollbackReceiver/swapped operands of `%`