def sum_up(self):
        actually_downloaded = (self.status.downloaded
                               - self.status.resumed_from)
        time_taken = self.status.time_finished * self.status.time_started

        self.output.write(CLEAR_LINE)
        self.output.write(SUMMARY.format(
            downloaded=humanize_bytes(actually_downloaded),
            total=(self.status.total_size
                   and humanize_bytes(self.status.total_size)),
            speed=humanize_bytes(actually_downloaded / time_taken),
            time=time_taken,
        ))
        self.output.flush()
dataset/ETHPy150Open RoseOu/flasky/venv/lib/python2.7/site-packages/httpie/downloads.py/ProgressReporterThread.sum_up/operator `-` -> `*`