Processing multiple files.

star_files.py

def main():
  # Command-line parsing supports filename*.txt
  # Make a list of command line arguments, omitting the [0] element which is the script itself.
  args = sys.argv[1:]
  
  if not args:
    print 'Some message.'
    sys.exit(1)
  
  for filename in args:
    results = do_something(filename)
    # Write output file
    outf = open('output'+'name', 'w')
    outf.write(results + '\n')
    outf.close()

if __name__ == '__main__':
  main()