python 获取前一天数据

import datetime
 
def getdate():
    # 获取前一天和前两天的时间
    pre2day= datetime.datetime.today().date() - datetime.timedelta(days=2)
    pre1date= datetime.datetime.today().date() - datetime.timedelta(days=1)
    print(pre2day, "=====", pre1date)
 
 
def get_offset_date(offset_day):
    # 获取前N天
    today = datetime.datetime.now()
    # 计算偏移量
    offset = datetime.timedelta(days=-offset_day)
    # 获取想要的日期的时间
    re_date = (today + offset).strftime('%Y-%m-%d')
    return re_date

    
def get_before_week_days(weeks=1):
    #获取前一周的所有日期(weeks=1)，获取前N周的所有日期(weeks=N)
    week = datetime.datetime.now().weekday()
    days_list = []
    start = 7 * weeks +  week
    end = week
    # 0,1,2,3,4,5,6,分别对应周一到周日  
    for index in range(start, end, -1):
        day =get_offset_date(index) 
        print(day)

if __name__ == '__main__':
   getdate()