python判断某一天为周几

根据某个日期，获取该日期为星期几？代码如下：

import datetime,time
time_str = '2020-11-08'
week = datetime.datetime.fromtimestamp(time.mktime(time.strptime(time_str, "%Y-%m-%d"))).weekday() + 1
print(time_str + '是周' + str(week))

运行结果：

2020-11-08是周7