code: def add_options(cls, parser):
          
          kwargs = {'action': 'store', 'default': '', 'parse_from_config': True,
                    'comma_separated_list': True}
          for num in range(cls.min_check, cls.max_check):
              parser.add_option(None, "--filename_check{}".format(num), **kwargs)
docs: Required by flake8
          add the possible options, called first
  
          Args:
              parser (OptionsManager):