Python：有效地格式化日期时间，同时将其保留为日期时间对象

发布于 2024-10-22 01:09:37 字数 267 浏览 2 评论 0原文

我希望能够格式化日期时间对象，同时将其保留为对象。我已经尝试过一种方法来做到这一点，但似乎效率不是很高。

我的具体目标是将秒上的额外数字限制为 2。这就是我目前正在做的事情：

now = datetime.datetime.now().strftime('%Y-%m-%d %H:%M:%S')
now_frmt = datetime.datetime.strptime(now, '%Y-%m-%d %H:%M:%S')

干杯，杰杰

原文

I want to be able to format a datetime object, while leaving it as an object. I have worked a way to do it, but it doesn't seem very efficient.

My specific aim is to limit the extra digits on the seconds to 2. This is how I am currently doing it:

now = datetime.datetime.now().strftime('%Y-%m-%d %H:%M:%S')
now_frmt = datetime.datetime.strptime(now, '%Y-%m-%d %H:%M:%S')

Cheers,
JJ

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耳钉梦 2024-10-29 01:09:37

您可以这样做来减去微秒：

now = datetime.datetime.now()
now_frmt = now - datetime.timedelta(microseconds=now.microsecond)

要四舍五入到最接近的秒，您可以执行以下操作：

now = datetime.datetime.now()
delta = (0 if now.microsecond < 500000 else 1000000) - now.microsecond
now_frmt = now + datetime.timedelta(microseconds=delta)

You could do this to subtract off the microseconds:

now = datetime.datetime.now()
now_frmt = now - datetime.timedelta(microseconds=now.microsecond)

To round to the nearest second you can do the following:

now = datetime.datetime.now()
delta = (0 if now.microsecond < 500000 else 1000000) - now.microsecond
now_frmt = now + datetime.timedelta(microseconds=delta)

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