WEEK07: File I/O, top-down design
 F: more File I/O



 - I have a file with itunes data in it: "/scratch/knerr/itunes.csv"
 - csv stands for comma-separated-values:

$ head -4 /scratch/knerr/itunes.csv 
Lights,Ellie Goulding,3:32:00,Pop,4/9/2012 15:15:00,1,Lights,2011
Won't Be the Last Time,Justin Townes Earle,3:12:00,Singer/Songwriter,4/8/2012 19:32:00,0,Nothing's Gonna Change the Way You Feel About Me Now,2012
Maria,Justin Townes Earle,2:37:00,Singer/Songwriter,4/8/2012 19:31:00,1,Nothing's Gonna Change the Way You Feel About Me Now,2012
Blues Clair,Django Reinhardt,3:05:00,Jazz,4/7/2012 9:25:00,0,The Best Of,1996

 - each line in the file represents one song in my itunes library
 - each line has 8 fields, separated by commas:

song name, artist, running-time, genre, date-of-purchase, number of plays, album, year

 - write a python program to figure out the name of the most-played song 
   in that itunes file

 - here's a harder problem, just to think about (we'll do sorting in a 
   few weeks): how would you read in all the itunes data and store it
   in a variable, so you could later sort it?

$ python itunes-advanced.py 
         Do You Feel by                    The Rocket Summer -- 155 plays
             Tamacun by                   Rodrigo y Gabriela -- 149 plays
             It's On by                           Superchick -- 140 plays
  How Far We've Come by                      Matchbox Twenty -- 129 plays
     Big Yellow Taxi by     Counting Crows & Vanessa Carlton -- 119 plays
        Shining Star by                   Earth| Wind & Fire -- 117 plays
      Let's Get Loud by                    Countdown Singers -- 113 plays
            Rockstar by                       Hannah Montana -- 113 plays
      Imperial March by John Williams; Boston Pops Orchestra -- 112 plays
  Everyday Superhero by                          Smash Mouth -- 111 plays