如何在 Python 中使用 datetime 从当前日期获取最近

How to get Sundays of last 90 days (3 months) from current date using datetime in Python(如何在 Python 中使用 datetime 从当前日期获取最近 90 天(3 个月)的星期日)

问题描述

我正在尝试使用日期时间从 python 中的当前日期获取最近 90 天(星期日 3 个月星期日)的日期.我可以在周日获得最后 3 个月，但不能从当前日期开始.使用此代码，我将获得本月和过去 2 个月(共 3 个月)的星期日列表.

I am trying to get a date of last 90 days Sundays (3 months Sunday) from the current date in python using datetime. I am able to get last 3 months Sunday but not from current date. With this code i am getting list of Sunday from the current month and last 2 month (total 3 months).

from datetime import date, timedelta, datetime

def list_sunday(year, month, day):
  try:
    for i in range(1,4):
        d = date(year, month, day)
        d += timedelta(days = 6 -d.weekday())
        while d.month==month:
            yield d
            d += timedelta(days =+ 7)

        if month > 1:
            month = month - 1
        else:
            month = 12
            year = year - 1

        i+=1
  except Exception as e:
    log.error("XXX %s" % str(e))

for d in list_sunday(2019, 4, 05):
    print d

使用上面的代码，我得到了这个

With above code, i am getting this

2019-04-07
2019-04-14
2019-04-21
2019-04-28
2019-03-10
2019-03-17
2019-03-24
2019-03-31
2019-02-10
2019-02-17
2019-02-24

这就是我想要得到的，

2019-03-10
2019-03-17
2019-03-24
2019-03-31
2019-02-10
2019-02-17
2019-02-24
2019-01-06
2019-01-13
2019-01-20
2019-01-27

有人可以帮忙吗?

推荐答案

from datetime import date, timedelta
from pprint import pprint

def is_sunday(day):
    return day.weekday() == 6

def sundays_within_last_x_days(num_days = 90):
    result = []
    end_date = date.today()
    start_date = end_date - timedelta(days = num_days)

    while start_date <= end_date:
        if is_sunday(start_date):
            result.append(start_date)
        start_date += timedelta(days = 1)

    return result

if __name__ == "__main__":
    dates = sundays_within_last_x_days(30)
    pprint(dates)

资源

• Python DateTime, TimeDelta, Strftime(格式)举例
• datetime - 基本日期和时间类型
• pprint - 数据漂亮的打印机

• Python DateTime, TimeDelta, Strftime(Format) with Examples
• datetime - Basic date and time types
• pprint - Data pretty printer

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