如何比较两个日期？ [英] How to compare two dates?

问题描述

如何使用Python比较两个日期，以查看稍后的日期？

How would I compare two dates to see which is later, using Python?

例如，我想检查当前日期是否在最后一个日期之后我正在创建的这个假期日期列表，以便它将自动发送电子邮件，告诉管理员更新holiday.txt文件。

For example, I want to check if the current date is past the last date in this list I am creating, of holiday dates, so that it will send an email automatically, telling the admin to update the holiday.txt file.

推荐答案

使用 datetime 方法和运算符< 及其亲属。

Use the datetime method and the operator < and its kin.

>>> from datetime import datetime, timedelta
>>> past = datetime.now() - timedelta(days=1)
>>> present = datetime.now()
>>> past < present
True
>>> datetime(3000, 1, 1) < present
False
>>> present - datetime(2000, 4, 4)
datetime.timedelta(4242, 75703, 762105)

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