使用sqlalchemy将记录从json对象插入表中

Question

我正在尝试编写一个从api调用中获取json对象的程序，然后将其加载到数据库中。当我编译AttributeError: 'TextClause' object has no attribute 'implicit_returning'或尝试自己执行它时，sqlalchemy不断抛出错误stmt。

def load_results(self):
      connect = self.engine.connect()

      for ru in self.json_ru:
          counties = ru['counties']
          for county in counties:
              transaction = connect.begin()
              params = {"reportingunitName": ru['reportingunitName'],
                                "geoCode": ru['geocode'],
                                "townsTotal": ru['towns'],
                                "townsReporting": ru['townsReporting'],
                                "cableName": county['cableName'],
                                "unitCount": county['unitCount']
                                }
              stmt = expression.insert('{}.raw_feed'.format(self.state)).values(params)
              compiled_stmt = stmt.compile(self.engine)
              connect.execute(compiled_stmt)
              transaction.commit()

在我进行查询之前，我只是提供了connect.execute，但是作为值进入的字符串被读作列名，所以我尝试了上面的代码。也使用Postgres风味。