tag.py 文件源码

def _getBpm(self):
        from decimal import Decimal, ROUND_HALF_UP, InvalidOperation

        bpm = None
        if frames.BPM_FID in self.frame_set:
            bpm_str = self.frame_set[frames.BPM_FID][0].text or u"0"
            try:
                # Round floats since the spec says this is an integer. Python3
                # changed how 'round' works, hence the using of decimal
                bpm = int(Decimal(bpm_str).quantize(1, ROUND_HALF_UP))
            except (InvalidOperation, ValueError) as ex:
                log.warning(ex)
        return bpm