Pyhton学习中遇到的问题希望能够得到解决

在学习当中遇到了这个Pyhton的问题，希望得到解决来完成这个学习项目

如果今天是星期天的话，需要加7天才是下个星期天

import datetime as d
today = d.date.today()
today_weekday = today.isoweekday()
next_sunday = (d.datetime.now()+d.timedelta(days=7-today_weekday+7*(today_weekday==7))).strftime("%Y-%m-%d")
next_monday = (d.datetime.now()+d.timedelta(days=8-today_weekday)).strftime("%Y-%m-%d")
print(next_sunday)
print(next_monday)

import datetime as d
today = d.date.today()
today_weekday = today.isoweekday()
next_sunday = (d.datetime.now()+d.timedelta(days=7-today_weekday)).strftime("%Y-%m-%d")
next_monday = (d.datetime.now()+d.timedelta(days=8-today_weekday)).strftime("%Y-%m-%d")
print(next_sunday)
print(next_monday)