1、法一
导入datetime包即可；
第二行使用了datetime进行相加，所以传参也得使用datetime进行封装，这样类型才会想等，如：
datetime.datetime.strptime("-04-24", '%Y-%m-%d'))
计算周一和周日代码实现：
def get_last_monday_sunday(today_time):monday, sunday = today_time + datetime.timedelta(days=-7), today_time + datetime.timedelta(days=-7)one_day = datetime.timedelta(days=1)while monday.weekday() != 0:monday -= one_daywhile sunday.weekday() != 6:sunday += one_dayreturn str(monday.strftime('%Y%m%d'))[0:8], str(sunday.strftime('%Y%m%d'))[0:8]
2、法二（更简单）
逻辑：当天时间-当前周几-1或7
import copyimport datetimeif __name__ == '__main__':now = datetime.datetime.now()print(now) # -04-21 17:25:29.433232 print(datetime.timedelta(now.weekday())) # 4 days, 0:00:00print(datetime.timedelta(days=7)) # 7 days, 0:00:00print("上周日时间是:",datetime.datetime.strftime(now - datetime.timedelta(now.weekday()) - datetime.timedelta(days=1),"%Y-%m-%d")) # 上周日时间是: -04-16print("上周一时间是:",datetime.datetime.strftime(now - datetime.timedelta(now.weekday()) - datetime.timedelta(days=7),"%Y-%m-%d")) # 上周一时间是: -04-10
