setup.py: install_requires=['six>=1.11.0']
setup.py: install_requires=['six>=1.11.0']

We will require the popular [__six__](https://pypi.org/project/six) module to simplify our support of both Python 2 and Python 3.
vnpy/vnpy,rrrrrr8/vnpy,harveywwu/vnpy,andrewchenshx/vnpy,vnpy/vnpy,rrrrrr8/vnpy,msincenselee/vnpy,andrewchenshx/vnpy,harveywwu/vnpy,andrewchenshx/vnpy,harveywwu/vnpy,bigdig/vnpy,andrewchenshx/vnpy,rrrrrr8/vnpy,rrrrrr8/vnpy,msincenselee/vnpy,rrrrrr8/vnpy,harveywwu/vnpy,harveywwu/vnpy,bigdig/vnpy,harveywwu/vnpy,msincenselee/vnpy,rrrrrr8/vnpy,andrewchenshx/vnpy,bigdig/vnpy,bigdig/vnpy,msincenselee/vnpy