old_contents: import csv
  import sys
  
  with open(sys.argv[1]) as fp:
      reader = csv.reader(fp, dialect="csv")
      for line in reader:
          print line
          break
  
  
new_contents: import csv
  import sys
  
  with open(sys.argv[1]) as fp:
      reader = csv.reader(fp)
      writer = csv.writer(sys.stdout, dialect="excel-tab")
      for line in reader:
          if line[0] == "sequence name":
              continue
          elif line[5] == '':
              continue
          else:
              writer.writerow(line[0], line[1],
                      line[2], line[3], line[5])
              break
  
  
subject: update the code