Note that win-unicode-console replaces the stdio streams rather than wraps them. So the desired state would be Unicode stream objects wrapped by PTVS. There would be no problem if win-unicode-console stream replacement occured before PTVS wraps them, which should be the case when Unicode streams for Windows are hadled by Python 3.5 itself. Is there any way to run custom Python code (like sitecustomize) before PTVS wraps the stdio streams?