python 第三方库 时间 arrow

arrow简介

arrow是一个提供了更易懂和友好的方法来创建、操作、格式化和转化日期、时间和时间戳的python库。可以完全替代datetime，支持python2和3。

安装方法

官方文档

用法

1. 获取当前时间

   # utc 时间
   In [16]: arrow.utcnow()
   Out[16]: <Arrow [2020-04-29T12:16:38.437675+00:00]>
   
   # 本地时间
   In [17]: arrow.now()
   Out[17]: <Arrow [2020-04-29T20:16:53.059585+08:00]>
       
   In [29]: arrow.now("Asia/Shanghai")
   Out[29]: <Arrow [2020-04-29T20:28:09.429144+08:00]>
       
   In [61]: local.ctime()
   Out[61]: 'Wed Apr 29 21:33:39 2020'
   

2. 获取时间戳

   In [18]: arrow.now().timestamp
   Out[18]: 1588162957
   
   In [19]: arrow.utcnow().timestamp
   Out[19]: 1588162963
   

3. 切换时区

   In [55]: local = arrow.now().to("Asia/Shanghai")
   
   In [56]: local
   Out[56]: <Arrow [2020-04-29T21:32:07.196767+08:00]>
   
   In [57]: local.year
   Out[57]: 2020
   

4. 时间戳转化为Arrow对象

   In [37]: arrow.get(1367900664)
   Out[37]: <Arrow [2013-05-07T04:24:24+00:00]>
   
   In [38]: arrow.get(1367900664.123456)
   Out[38]: <Arrow [2013-05-07T04:24:24.123456+00:00]>
   

5. 格式化时间

   In [20]: arrow.now().format()
   Out[20]: u'2020-04-29 20:23:56+08:00'
   
   In [21]: arrow.now().format("YYYY-MM-DD HH:mm")
   Out[21]: u'2020-04-29 20:24'
   

6. 转化为Arrow对象

   In [40]: arrow.get("2020-04-29 20:23", "YYYY-MM-DD HH:mm")
   Out[40]: <Arrow [2020-04-29T20:23:00+00:00]>
   
   In [41]: arrow.get("2020-04-29 20:23")
   Out[41]: <Arrow [2020-04-29T20:23:00+00:00]>
       
   In [42]: arrow.get(2020,4,29)
   Out[42]: <Arrow [2020-04-29T00:00:00+00:00]>
   
   In [43]: arrow.get(2020,4,29,20,30)
   Out[43]: <Arrow [2020-04-29T20:30:00+00:00]>
   
   

7. 时间推移

   t = arrow.now()
   <Arrow [2017-02-01T17:19:19.933507+08:00]>
   
   t.shift(days=-1)  # 前一天
   <Arrow [2017-01-31T17:19:19.933507+08:00]>
   
   t.shift(weeks=-1)  # 前一周
   <Arrow [2017-01-25T17:19:19.933507+08:00]>
   
   t.shift(months=-2) # 前两个月
   <Arrow [2016-12-01T17:19:19.933507+08:00]>
   
   t.shift(years=1)  # 明年
   <Arrow [2018-02-01T17:19:19.933507+08:00]>
   

8. 时间替换

   In [50]: a = arrow.now()
   
   In [51]: a
   Out[51]: <Arrow [2020-04-29T20:39:12.615185+08:00]>
   
   In [52]: a.replace(hour=4)
   Out[52]: <Arrow [2020-04-29T04:39:12.615185+08:00]>
   

9. 对象的属性

   >>> a = arrow.now()
   >>> a
   <Arrow [2016-07-04T20:17:09.633154+08:00]>
   >>> a.timestamp
   1467634629
   >>> a.year
   2016
   >>> a.month
   7
   >>> a.day
   4
   >>> a.hour
   20
   >>> a.minute
   17
   >>> a.second
   9
   >>> a.microsecond
   633154
   >>> a.week
   27
   

Token

	Token	Output
Year	YYYY	2000, 2001, 2002 … 2012, 2013
	YY	00, 01, 02 … 12, 13
Month	MMMM	January, February, March …
	MMM	Jan, Feb, Mar …
	MM	01, 02, 03 … 11, 12
	M	1, 2, 3 … 11, 12
Day of Year	DDDD	001, 002, 003 … 364, 365
	DDD	1, 2, 3 … 4, 5
Day of Month	DD	01, 02, 03 … 30, 31
	D	1, 2, 3 … 30, 31
Day of Week	dddd	Monday, Tuesday, Wednesday …
	ddd	Mon, Tue, Wed …
	d	1, 2, 3 … 6, 7
Hour	HH	00, 01, 02 … 23, 24
	H	0, 1, 2 … 23, 24
	hh	01, 02, 03 … 11, 12
	h	1, 2, 3 … 11, 12
AM / PM	A	AM, PM
	a	am, pm
Minute	mm	00, 01, 02 … 58, 59
	m	0, 1, 2 … 58, 59
Second	ss	00, 01, 02 … 58, 59
	s	0, 1, 2 … 58, 59
Sub-second	SSS	000, 001, 002 … 998, 999
	SS	00, 01, 02 … 98, 99
	S	0, 1, 2 … 8, 9
Timezone	ZZ	-07:00, -06:00 … +06:00, +07:00
	Z	-0700, -0600 … +0600, +0700
Timestamp	X	1381685817