[Fix]close #1580
[Fix]close #1580

andrewchenshx/vnpy,msincenselee/vnpy,bigdig/vnpy,andrewchenshx/vnpy,msincenselee/vnpy,msincenselee/vnpy,bigdig/vnpy,andrewchenshx/vnpy,bigdig/vnpy,vnpy/vnpy,vnpy/vnpy,andrewchenshx/vnpy,bigdig/vnpy,andrewchenshx/vnpy,msincenselee/vnpy