[Mod] make flake8 happy
[Mod] make flake8 happy

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