如何在Python中从星期日开始的星期找到星期数？ [英] How can I find week numbers with weeks starting on Sunday in Python?

问题描述

Python的新手总数，如果很明显，请提前道歉。我有一些日期时间值，例如，我想为其指定年和周的数字：

Total newbie to Python, so apologies in advance if this is obvious. I have a number of datetime values, for which I would like to identify a year and week number, for example:

start_date = datetime.datetime(2015,1,26,0,0,0)

我要抓住的是我希望将周定义为从星期日开始。

The catch is, I would like the week to be defined as starting on a Sunday.

我知道datetime.isocalendar（）可以获取我的周号，但是它们将根据假设每周从星期一开始。还有其他方法吗？

I understand that the datetime.isocalendar() can get me week numbers, but they will be calculated under the assumption that weeks start on Mondays. Is there any other way?

编辑：运行Python 2.7.6

Running Python 2.7.6

谢谢！

推荐答案

字符串格式％U 将给出从星期日算起的一年中的星期：

String format %U will give the week of the year counting from Sunday:

t1 = datetime.datetime.now()
t1.strftime("%U")

请参见 http：// strftime .org / 获取格式参数的完整列表。

See http://strftime.org/ for full list of format parameters.

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