new_contents: import csv
  import sys
  import itertools
  
  
  def count_iter(iterable):
      # count lines in terable
      return sum(1 for _ in iterable)
  
  
  def setup_iter(reader):
      # Skip first row of the file
      readeriter = iter(reader)
      next(readeriter)
  
      return readeriter
  
  
  def list_get(li, pos, default):
      try:
          return li[pos]
      except IndexError:
          return default
  
  
  if __name__ == '__main__':
      try:
          name_of_file = sys.argv[1]
      except IndexError:
          print 'Usage: python {} filename.csv [start_percent [end_percent]]'.format(sys.argv[0])
          sys.exit(1)
  
      # maps numbers to frequency those numbers show up
      # so its a histogram
      num_to_freq = {
          1: 0,
          2: 0,
          3: 0,
          4: 0,
          5: 0,
          6: 0,
          7: 0,
          8: 0,
          9: 0,
      }
  
      start_percent = float(list_get(sys.argv, 2, 0.0))
      end_percent = float(list_get(sys.argv, 3, 1.0))
  
      with open(name_of_file, 'r') as csvfile:
          reader = csv.reader(csvfile)
  
          itr1, itr2 = itertools.tee(setup_iter(reader))
  
          lines = count_iter(itr1)
  
          start = start_percent * lines
          end = end_percent * lines
  
          for index, row in enumerate(itr2):
              if index < start:
                  continue
              if index >= end:
                  break
  
              for i in row[1].split(','):
                  try:
                      toint = int(i)
                  except ValueError:
                      continue
  
                  num_to_freq[toint] += 1
  
      for key, val in num_to_freq.items():
          print "{0}: {1}".format(key, val)
  
subject: Add the whole program nice job