code: def none_of(s):
      '''Parser a char NOT from specified string.'''
      @Parser
      def none_of_parser(text, index=0):
          if index < len(text) and text[index] not in s:
              return Value.success(index + 1, text[index])
          else:
              return Value.failure(index, 'none of {}'.format(s))
      return none_of_parsef none_of(s):
      '''Parser a char NOT from specified string.'''
      @Parser
      def none_of_parser(text, index=0):
          if index < len(text) and text[index] not in s:
              return Value.success(index + 1, text[index])
          else:
              return Value.failure(index, 'none of {}'.format(s))
      return none_of_parser
docs: Parser a char NOT from specified string.