用度、分、秒减去整数值？

Question

如何用度、分、秒减去整数值？当我减去两个变量时，会出现错误

pip install flatlib

import flatlib
from flatlib import const
from flatlib.chart import Chart
from flatlib.datetime import Datetime
from flatlib.geopos import GeoPos
from flatlib.dignities import accidental
from flatlib.dignities.accidental import AccidentalDignity

date= Datetime('2021/06/23','17:00','+00:00')
pos = GeoPos('38n32', '8w54')
chart = Chart(date, pos)
sun = chart.get(const.SUN)
A = 2
print(sun - A)

所需输出 +02:26:34-2=0:26:34