new_contents: 
  
  import os
  import sys
  import re
  
  
  def main():
      if len(sys.argv) != 3:
          print 'usage: ./DNAssMark.py --option file'
          print 'options:'
          print 'o1 - option 1'
          sys.exit(1)
  
      if sys.argv[1] == '--o1':
          f = open(sys.argv[2], 'rU')
          f.close()
  
      else:
          print 'Ivalid option!'
  
  
  
  # Standard template for the main() function
  if __name__ == '__main__':
    main()
  
subject: Create DNAssMark.py