Microsoft Reactor Toronto -- Following notesbooks at Python for Data Science course @MSFTReactor @MaRSDD led by #DavidJeppesen @ProwessConsult.  Python indexes strings starting from 0, but then the last character is indexed as -1.  Full room said to be larger than last session.  Many university students attending, learners don't rest during school term breaks.  (Microsoft Reactor Toronto, MaRS Discovery District, Toronto, Ontario) 20191216
{}