update : 2017/10/10
usage: $ awk -f dev.awk scores.csv $ ll
dev.awk first.awk first_last.awk first_last_count.awk last.awk
$ more scores.csv 2017-05-18,03:51:28,tanaka,181,294,49,278 2017-05-18,08:29:58,yamada,183,206,10,1 2017-05-18,09:30:18,sato,160,198,114,324 2017-05-18,14:47:22,sato,273,442,31,275
add Python codes. and merge.