如何在Python中比较日期？ [英] How to compare dates in Python?

问题描述

我需要查看日期是否超过X天。我如何在Python中做到这一点？

I need to see if a date has more than X days. How can I do this in Python?

我已经测试过类似的东西：

I have tested something like:

if datetime.date(2010, 1, 12) > datetime.timedelta(3):

我收到错误：

TypeError: can't compare datetime.date to datetime.timedelta

有关如何实现此目标的任何线索？

Any clue on how to achieve this?

推荐答案

您无法比较 datetime 到< a href = http://docs.python.org/py3k/library/datetime.html#timedelta-objects rel = noreferrer> timedelta 。 timedelta 表示持续时间， datetime 表示特定时间点。 差异与两个 datetime 的区别 code> s是 timedelta 。日期时间彼此可比， timedelta s也是如此。

You can't compare a datetime to a timedelta. A timedelta represents a duration, a datetime represents a specific point in time. The difference of two datetimes is a timedelta. Datetimes are comparable with each other, as are timedeltas.

您有2个选择：

• 从给定的值中减去另一个 datetime ，然后比较所得的 timedelta 与您还给出的 timedelta 。


• 转换将timedelta 添加到 datetime ，方法是将其添加或减去到另一个 datetime ，然后比较得到的 datetime 与您提供的 datetime 。

• Subtract another datetime from the one you've given, and compare the resulting timedelta with the timedelta you've also given.
• Convert the timedelta to a datetime by adding or subtracting it to another datetime, and then compare the resulting datetime with the datetime you've given.

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