def __check_existing(self, row):
if self.__update_keys is not None:<EOL><INDENT>key = tuple(row[key] for key in self.__update_keys)<EOL>if key in self.__bloom:<EOL><INDENT>return True<EOL><DEDENT>self.__bloom.add(key)<EOL>return False<EOL><DEDENT>return False<EOL>
Check if row exists in table