def _validate_args(self, args, via):
self._parser._config_source_hint = via<EOL>try:<EOL><INDENT>self._parser.parse_known_and_unknown_args(<EOL>args, namespace=copy.copy(self.option)<EOL>)<EOL><DEDENT>finally:<EOL><INDENT>del self._parser._config_source_hint<EOL><DEDENT>return args<EOL>
Validate known args.