import datetime

def main():
    today = datetime.datetime.today()
    date = today.date()

    # date datetime均可
    res = datetime.datetime.combine(today, datetime.time(8))

    # date datetime均可 但是结果类型不一样
    res = datetime+ datetime.timedelta(days=1)
    
    # date datetime均可
    res = datetime.datetime.combine(res, datetime.time())
    print(res)

if __name__ == '__main__':
    main()