python 获取n天前的日期和日期列表

import datetime def get_nday_list(n): import datetime before_n_days = [] for i in range(1, n + 1)[::-1]: before_n_days.append(str(datetime.date.today() - datetime.timedelta(days=i))) return before_n_days

a = get_nday_list(7) print(a) ['2017-02-22', '2017-02-23', '2017-02-24', '2017-02-25', '2017-02-26', '2017-02-27', '2017-02-28']

import datetime def get_day_nday_ago(date,n): t = time.strptime(date, "%Y-%m-%d") y, m, d = t[0:3] Date = str(datetime.datetime(y, m, d) - datetime.timedelta(n)).split() return Date[0]

示例

a=get_day_nday_ago('2017-02-11',7) print a 2017-02-04