old_contents: #! /usr/bin/env python
  # -*- coding: utf-8 -*-
  
  import argparse
  
  from qiniu import etag
  
  
  def main():
      parser = argparse.ArgumentParser(prog='qiniu')
      sub_parsers = parser.add_subparsers()
  
      parser_etag = sub_parsers.add_parser(
          'etag', description='calculate the etag of the file', help='etag [file...]')
      parser_etag.add_argument(
          'etag_files', metavar='N', nargs='+', help='the file list for calculate')
  
      args = parser.parse_args()
  
      try:
          etag_files = args.etag_files
  
      except AttributeError:
          etag_files = None
          
  
      if etag_files
          r = [etag(file) for file in etag_files]
          if len(r) == 1:
              print(r[0])
          else:
              print(' '.join(r))
  
  if __name__ == '__main__':
      main()
  
new_contents: #! /usr/bin/env python
  # -*- coding: utf-8 -*-
  
  import argparse
  
  from qiniu import etag
  
  
  def main():
      parser = argparse.ArgumentParser(prog='qiniu')
      sub_parsers = parser.add_subparsers()
  
      parser_etag = sub_parsers.add_parser(
          'etag', description='calculate the etag of the file', help='etag [file...]')
      parser_etag.add_argument(
          'etag_files', metavar='N', nargs='+', help='the file list for calculate')
  
      args = parser.parse_args()
  
      try:
          etag_files = args.etag_files
  
      except AttributeError:
          etag_files = None
          
  if etag_files
      r = [etag(file) for file in etag_files]
      if len(r) == 1:
          print(r[0])
      else:
          print(' '.join(r))
  
  if __name__ == '__main__':
      main()
  
subject: fix format