def __expire_files(self):
        """Because files are always unclean"""

        self.__files = OrderedDict(
            item for item in self.__files.items() if not item[1].expired
        )
def __expire_files ( self ) : self . __files = OrderedDict ( item for item in self . __files . items ( ) if not item [ 1 ] . expired )
Because files are always unclean