@Karthick Raja, Check this line in your code RatingsBreakdown.py line 12, in mapper_get_ratings (userID, movieID, rating, timestamp ) = line.split('\t') The line should have exactly 4 values else you may get the issue 'ValueError: need more than 2 values to unpack' . Check the input or add a validation if len(line.split('\t')) == 4: (userID, movieID, rating, timestamp ) = line.split('\t') ... View more