def get_date_year_month(date=None):
    date = date or datetime.datetime.now()
    #date ------- datetime.datetime(2018, 11, 1, 16, 38, 29, 71162)
    a = date.strftime("%Y-%m-%d")
    #a   ------- '2018-11-01'
    b = time.strptime(a, "%Y-%m-%d")
    #b ------- time.struct_time(tm_year=2018, tm_mon=11, tm_mday=1, tm_hour=0, tm_min=0, tm_sec=0, tm_wday=3, tm_yday=305, tm_isdst=-1)
    return b[0], b[1]

#date不传,默认当前时间 
year,month = get_date_year_month()