code: def _decode_preferred_encoding(s):
      
  
      enc = locale.getpreferredencoding()
      try:
          try:
              return s.decode(enc)
          except LookupError:
              enc = _DEFAULT_ENCODING
          return s.decode(enc)
      except UnicodeDecodeError:
          return s.decode('latin-1')
docs: Decode the supplied byte string using the preferred encoding
      for the locale (`locale.getpreferredencoding`) or, if the default encoding
      is invalid, fall back first on utf-8, then on latin-1 if the message cannot
      be decoded with utf-8.