主题：期权合约怎么获取

使用时发现，回测，取得依然是现在的合约，不能取当时的合约，monthtype, 取0或1，都是一样

        QQhy = opobyprirce("510050", "QQ", QQprice, 0, 1, 1)
        print([QQhy])
        QQclose = history_bars(QQhy, bar_len, '1d', 'CLOSE')
        print([context.now, QQprice, QQclose])

。。。。。。

23:54:01 > ['']
23:54:01 > [datetime.datetime(2020, 6, 24, 0, 0), 2.8, array([], dtype=float64)]
23:54:01 > ['QQ10003006']
23:54:01 > [datetime.datetime(2020, 7, 22, 0, 0), 3.4, array([], dtype=float64)]
23:54:01 > ['QQ10003004']
23:54:01 > [datetime.datetime(2020, 8, 26, 0, 0), 3.2, array([], dtype=float64)]
23:54:01 > ['QQ10003004']
23:54:01 > [datetime.datetime(2020, 9, 23, 0, 0), 3.2, array([], dtype=float64)]
23:54:01 > ['QQ10003005']
23:54:01 > [datetime.datetime(2020, 10, 28, 0, 0), 3.3, array([], dtype=float64)]
23:54:01 > ['QQ10003005']
23:54:01 > [datetime.datetime(2020, 11, 25, 0, 0), 3.3, array([], dtype=float64)]
23:54:01 > ['QQ10003006']
23:54:01 > [datetime.datetime(2020, 12, 23, 0, 0), 3.4, array([0.241     , 0.2278    , 0.2476    , 0.25459999, 0.25749999,
                  0.3019    , 0.27540001, 0.28740001, 0.25389999, 0.2678    ])]
23:54:01 > ['QQ10003010']
23:54:01 > [datetime.datetime(2021, 1, 27, 0, 0), 3.8, array([0.25330001, 0.24330001, 0.255     , 0.23720001, 0.2349    ,
                  0.2638    , 0.2502    , 0.26809999, 0.2286    , 0.2286    ])]
23:54:01 > ['QQ10003011']
23:54:01 > [datetime.datetime(2021, 2, 24, 0, 0), 3.9, array([0.2599    , 0.24699999, 0.1816    , 0.18279999, 0.1512    ])]
23:54:01 > ['QQ10003008']
23:54:01 > [datetime.datetime(2021, 3, 24, 0, 0), 3.6, array([0.1693    , 0.1626    , 0.13699999, 0.1426    , 0.13680001,
                  0.1383    , 0.0958    , 0.1024    , 0.0951    , 0.0819    ])]
23:54:01 > ['QQ10003006']
23:54:01 > [datetime.datetime(2021, 4, 28, 0, 0), 3.4, array([0.1179    , 0.1257    , 0.1661    , 0.15790001, 0.1592    ,
                  0.1441    , 0.1652    , 0.1295    , 0.13420001, 0.133     ])]
23:54:01 > ['QQ10003005']
23:54:01 > [datetime.datetime(2021, 5, 26, 0, 0), 3.3, array([0.15449999, 0.2225    , 0.25      , 0.2465    , 0.22480001,
                  0.23459999, 0.19660001, 0.2045    , 0.34869999, 0.36070001])]

均为2021年6月，即当前合约的数据

请帮忙解决一下