Discussion between Insider and Igor Chubin

Imported from a comment discussion on http://ru.stackoverflow.com/questions/556837/python-serial-%d0%bd%d0%b5-%d0%be%d1%82%d0%bf%d1%80%d0%b0%d0%b2%d0%bb%d1%8f%d0%b5%d1%82%d1%81%d1%8f-%d0%ba%d0%be%d0%bc%d0%b0%d0%bd%d0%b4%d0%b0/556867#556867