I have just been educated by reading more of this thread. I can see an obvious need for one virtualenv, so that you can separate your service and its needs from

I have just been educated by reading more of this thread. I can see an obvious need for one virtualenv, so that you can separate your service and its needs from the system python and its needs. Beyond that my inclination would be to go more servers rather than more virtualenvs, but circumstances vary and my experience is narrow.