new_contents: import sys
  import csv
  
  USAGE = 'Usage: python [--read <file>] [--insert <file> <insert_word>]'
  IDXERR_MESSAGE = lambda x: 'Index error: {0}'.format(x)
  IOERR_MESSAGE = lambda x: 'I/O error: {0}'.format(x)
  
  def option_parser():
      argv = sys.argv
      if len(argv) == 1:
          return USAGE
      argv.pop(0)
      options = [option for option in argv if option.startswith('-')]
  
      if '-h' in options or '--help' in options:
          return USAGE
      if '-r' in options or '--read' in options:
          position = argv.index('-r') if '-r' in options else argv.index('--read')
          try:
              csv_file = argv[position + 1]
          except IndexError as err:
              print(IDXERR_MESSAGE(err))
              return USAGE
          except:
              raise
          read(argv[position + 1])
      if '-i' in options or '--insert' in options:
          position = argv.index('-i') if '-i' in options else argv.index('--insert')
          try:
              csv_file = argv[position + 1]
              word = [argv[position + 2]]
          except IndexError as err:
              print(IDXERR_MESSAGE(err))
              return USAGE
          except:
              raise
          insert(argv[position + 1], [argv[position + 2]])
  
  def read(csv_file):
      try:
          f = open(csv_file, 'rU')
          r = csv.reader(f)
          for row in r:
              if len(row) < 1:
                  continue
              print(row)
          f.close()
      except IOError as err:
          print(IOERR_MESSAGE(err))
      except:
          raise
  
  def insert(csv_file, insert):
      try:
          f = open(csv_file, 'w')
          w = csv.writer(f)
          w.writerow(insert)
          f.close()
      except IOError as err:
          print(IOERR_MESSAGE(err))
      except:
          raise
  
  if __name__ == '__main__':
      result = option_parser()
      if result:
          print(result)
  
subject: Create csv_method.py