timelib.py 文件源码

def rel_dt_test(dt, min_rel_dt=(1,1), max_rel_dt=(12,31)):
    if dt_check(dt): 
        dt_doy = dt2doy(dt)
        min_doy = dt2doy(datetime(dt.year, *min_rel_dt))
        max_doy = dt2doy(datetime(dt.year, *max_rel_dt))
        #If both relative dates are in the same year
        if min_doy < max_doy:
            min_dt = datetime(dt.year, min_rel_dt[0], min_rel_dt[1])
            max_dt = datetime(dt.year, max_rel_dt[0], max_rel_dt[1])
        else:
            #If relative dates span Jan 1
            if dt_doy >= min_doy:
                min_dt = datetime(dt.year, min_rel_dt[0], min_rel_dt[1])
                max_dt = datetime(dt.year + 1, max_rel_dt[0], max_rel_dt[1])
            else:
                min_dt = datetime(dt.year - 1, min_rel_dt[0], min_rel_dt[1])
                max_dt = datetime(dt.year, max_rel_dt[0], max_rel_dt[1])
        out = (dt >= min_dt) & (dt <= max_dt)
    else:
        out = False
    return out