old_contents: from __future__ import print_function
  
  import argparse
  import sys
  from opencc import OpenCC
  
  
  def main():
      parser = argparse.ArgumentParser(
          formatter_class=argparse.ArgumentDefaultsHelpFormatter)
      parser.add_argument('-i', '--input', metavar='<file>',
                          help='Read original text from <file>.')
      parser.add_argument('-o', '--output', metavar='<file>',
                          help='Write converted text to <file>.')
      parser.add_argument('-c', '--config', metavar='<file>',
                          help='Configuration file')
      parser.add_argument('--in-enc', metavar='<encoding>', default='UTF-8',
                          help='Encoding for input')
      parser.add_argument('--out-enc', metavar='<encoding>', default='UTF-8',
                          help='Encoding for output')
      args = parser.parse_args()
  
      if args.config is None:
          print("Please specify a configuration file.", file=sys.stderr)
          return 1
  
      cc = OpenCC(args.config)
  
      with open(args.input if args.input else 0, encoding=args.in_enc) as f:
          input_str = f.read()
      output_str = cc.convert(input_str)
      with open(args.output if args.output else 1, 'w',
                encoding=args.out_enc) as f:
          f.write(output_str)
  
      return 0
  
  
  if __name__ == '__main__':
      sys.exit(main())
  
new_contents: from __future__ import print_function
  
  import argparse
  import sys
  import io
  from opencc import OpenCC
  
  
  def main():
      parser = argparse.ArgumentParser(
          formatter_class=argparse.ArgumentDefaultsHelpFormatter)
      parser.add_argument('-i', '--input', metavar='<file>',
                          help='Read original text from <file>.')
      parser.add_argument('-o', '--output', metavar='<file>',
                          help='Write converted text to <file>.')
      parser.add_argument('-c', '--config', metavar='<conversion>',
                          help='Conversion')
      parser.add_argument('--in-enc', metavar='<encoding>', default='UTF-8',
                          help='Encoding for input')
      parser.add_argument('--out-enc', metavar='<encoding>', default='UTF-8',
                          help='Encoding for output')
      args = parser.parse_args()
  
      if args.config is None:
          print("Please specify a conversion.", file=sys.stderr)
          return 1
  
      cc = OpenCC(args.config)
  
      with io.open(args.input if args.input else 0, encoding=args.in_enc) as f:
          input_str = f.read()
      output_str = cc.convert(input_str)
      with io.open(args.output if args.output else 1, 'w',
                encoding=args.out_enc) as f:
          f.write(output_str)
  
      return 0
  
  
  if __name__ == '__main__':
      sys.exit(main())
  
subject: Add support for Python 2.6 and 2.7