progressbar.py 文件源码

def _display_progress_bar(self, size_read):
        self._totalread += size_read
        if self._show_progress:
            if self._totalsize:
                percent = float(self._totalread) / float(self._totalsize)
                # Output something like this: [==========>             ] 49%
                sys.stdout.write('\r[{0:<30}] {1:.0%}'.format(
                    '=' * int(decimal.Decimal(percent * 29).quantize(
                        decimal.Decimal('1'),
                        rounding=decimal.ROUND_HALF_UP)) + '>', percent
                ))
            else:
                sys.stdout.write(
                    '\r[%s] %d bytes' % (SPIN_CHARS[self._spin_index],
                                         self._totalread))
                self._spin_index += 1
                if self._spin_index == len(SPIN_CHARS):
                    self._spin_index = 0
            sys.stdout.flush()