def __get_unused_context(self, parse_result, context):
tags_keys = set([t['<STR_LIT:key>'] for t in parse_result['<STR_LIT>'] if t['<STR_LIT>']])<EOL>result_context = [c for c in context if c['<STR_LIT:key>'] not in tags_keys]<EOL>return result_context<EOL>
Used to get unused context from context.  Any keys not in
        parse_result

        Args:
            parse_results(list): parsed results used to identify what keys
                in the context are used.
            context(list): this is the context used to match with parsed results
                keys missing in the parsed results are the unused context

        Returns:
            list: A list of the unused context results.