def validated_formatter(self, url_format):
<EOL>valid_parameters = {<EOL>"<STR_LIT>": "<STR_LIT>",<EOL>"<STR_LIT>": "<STR_LIT>",<EOL>"<STR_LIT>": "<STR_LIT>",<EOL>"<STR_LIT>": "<STR_LIT>",<EOL>"<STR_LIT>": "<STR_LIT:user>",<EOL>}<EOL>dummy_formatted_url = url_format<EOL>for key, value in valid_parameters.items():<EOL><INDENT>dummy_formatted_url = dummy_formatted_url.replace(key, value)<EOL><DEDENT>if '<STR_LIT:$>' in dummy_formatted_url:<EOL><INDENT>raise Exception("<STR_LIT>" % (url_format))<EOL><DEDENT>return url_format<EOL>
validate visualization url format