我们如何确定python中给定月份的天数
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How do we determine the number of days for a given month in python
提问by Joel James
I need to calculate the number of days for a given month in python. If a user inputs Feb 2011 the program should be able to tell me that Feb 2011 has 28 days. Could any one tell me which library I should use to determine the length of a given month.
我需要在 python 中计算给定月份的天数。如果用户输入 2011 年 2 月，程序应该能够告诉我 2011 年 2 月有 28 天。谁能告诉我应该使用哪个图书馆来确定给定月份的长度。
采纳答案by Andrew Hare
Use calendar.monthrange:
>>> from calendar import monthrange
>>> monthrange(2011, 2)
(1, 28)
Just to be clear, monthrangesupports leap years as well:
需要明确的是，也monthrange支持闰年：
>>> from calendar import monthrange
>>> monthrange(2012, 2)
(2, 29)
As @mikhail-pyrev mentions in a comment:
正如@mikhail-pyrev 在评论中提到的：
First number is weekday of first day of the month, second number is number of days in said month.
第一个数字是该月第一天的工作日，第二个数字是该月的天数。
回答by Bj?rn Lindqvist
Alternative solution:
替代解决方案：
>>> from datetime import date
>>> (date(2012, 3, 1) - date(2012, 2, 1)).days
29
回答by Frosty Snowman
Just for the sake of academic interest, I did it this way...
只是为了学术兴趣，我是这样做的……
(dt.replace(month = dt.month % 12 +1, day = 1)-timedelta(days=1)).day
