如何获取前n周的开始与结束时间？

def get_time_range(pre_n_week):
    """
    获取前n周时间范围（开始0点，结束24点）
    :param pre_n_week:
    :return: 毫秒
    """
    today = datetime.date.today()
    # n周开始日期
    s = today - datetime.timedelta(days=today.weekday() + 7 * pre_n_week)
    # n周结束日期
    e = s + datetime.timedelta(days=6)

    # 0点
    start_time = datetime.datetime.combine(date=s, time=datetime.time.min)
    end_time = datetime.datetime.combine(date=e, time=datetime.time.max)

    gte = int(round(start_time.timestamp()*1000))
    lte = int(round(end_time.timestamp()*1000))+86400000-1
    return gte, lte
 

效果如下，可以根据不同的格式（时间戳，毫秒等）需求自行处理。

屏幕快照 2019-12-20 14.27.48.png

假定每周都是从周六开始，周五结束怎么获取每周的日期范围？

def get_week_range(pre_n_week=0, simple_date=True):
    """
    获取前n周时间范围(每周始于周六，至周五终止）
    :param pre_n_week:
    :param simple_date:简单日期格式如2020-3-21
    :return:本周开始，本周结束，当前是本周第几天
    """
    offset = 2 #提前2天（理论上可以修改你期望的值，其它的没有测试）
    today = datetime.date.today()
    # n周开始日期
    s = today - datetime.timedelta(days=(today.weekday() + offset) % 7 + 7 * pre_n_week)
    # n周结束日期
    e = s + datetime.timedelta(days=6)

    n = (today-s).days
    if simple_date:
        return s.strftime("%Y-%m-%d"), e.strftime("%Y-%m-%d"), n
    return s, e, n

# 测试代码
@pytest.mark.parametrize('pre_n_week, assume_date, expected_s, expected_e',
                         [
                             (0, '2020-05-01', '2020-04-25', '2020-05-01'),
                             (1, '2020-05-01', '2020-04-18', '2020-04-24'),
                             (0, '2020-04-30', '2020-04-25', '2020-05-01'),
                             (1, '2020-04-30', '2020-04-18', '2020-04-24'),
                             (0, '2020-05-15', '2020-05-09', '2020-05-15'),
                             (0, '2020-05-02', '2020-05-02', '2020-05-08'),
                             (1, '2020-05-02', '2020-04-25', '2020-05-01'),
                             (0, '2020-05-03', '2020-05-02', '2020-05-08'),
                             (1, '2020-05-03', '2020-04-25', '2020-05-01'),
                             (0, '2020-05-04', '2020-05-02', '2020-05-08'),
                         ])
def test_get_week_range(pre_n_week, assume_date, expected_s, expected_e):
    t = datetime.strptime(assume_date, '%Y-%m-%d')
    ts = (t - datetime(year=1970, month=1, day=1)).total_seconds()
    with freeze_time(ts):
        s, e, n = get_week_range(pre_n_week=pre_n_week)
        assert s == expected_s
        assert e == expected_e