times.py 文件源码

def TimeDelta_or_None(s):
    try:
        h, m, s = s.split(':')
        h, m, s = int(h), int(m), float(s)
        td = timedelta(hours=abs(h), minutes=m, seconds=int(s),
                       microseconds=int(math.modf(s)[0] * 1000000))
        if h < 0:
            return -td
        else:
            return td
    except ValueError:
        # unpacking or int/float conversion failed
        return None