time_utils.py 文件源码

def datenum_to_datetime(timestamp):
    if isinstance(timestamp, pd.Series):
        return (timestamp.astype(int).map(datetime.datetime.fromordinal) +
                pd.to_timedelta(timestamp % 1, unit='D') -
                pd.to_timedelta('366 days'))
    else:
        return (datetime.datetime.fromordinal(int(timestamp) - 366) +
                datetime.timedelta(days=timestamp % 1))