Cut .csv to pieces and save as .csv

[merlem]

About the error: It is a question of using version 2 or 3, and other people had the problem, too. There are a couple of suggestions at http://stackoverflow.com/questions/72006...-csv-files .
Simply eliminate the 'b' from opening the newfile:

newfile = open(newfilename, 'w')

Then it should run, I hope.