Metadata item name to parser function mapping.

def parsers(self):
        """Metadata item name to parser function mapping."""
        parse_list = self._parse_list
        parse_file = self._parse_file
        parse_dict = self._parse_dict
        exclude_files_parser = self._exclude_files_parser

        return {
            'platforms': parse_list,
            'keywords': parse_list,
            'provides': parse_list,
            'requires': self._deprecated_config_handler(
                parse_list,
                "The requires parameter is deprecated, please use "
                "install_requires for runtime dependencies.",
                DeprecationWarning),
            'obsoletes': parse_list,
            'classifiers': self._get_parser_compound(parse_file, parse_list),
            'license': exclude_files_parser('license'),
            'description': parse_file,
            'long_description': parse_file,
            'version': self._parse_version,
            'project_urls': parse_dict,
        }