以毫秒为单位将纪元时间转换为日期时间 [英] converting epoch time with milliseconds to datetime

问题描述

我使用 ruby​​ 脚本将 iso 时间戳转换为纪元，我正在解析的文件具有以下时间戳结构:

2009-03-08T00:27:31.807

因为我想保持毫秒，所以我使用以下 ruby​​ 代码将其转换为纪元时间:

irb(main):010:0>DateTime.parse('2009-03-08T00:27:31.807').strftime("%Q")=>1236472051807"

但在 python 中我尝试了以下操作:

导入时间time.strftime('%Y-%m-%d %H:%M:%S', time.gmtime(1236472051807))

但我没有得到原始时间日期时间，

<预><代码>>>>time.strftime('%Y-%m-%d %H:%M:%S', time.gmtime(1236472051807))'41152-03-29 02:50:07'>>>

我想知道这与我的格式化方式有关吗?

解决方案

使用 datetime.datetime.fromtimestamp:

<预><代码>>>>导入日期时间>>>s = 1236472051807/1000.0>>>datetime.datetime.fromtimestamp(s).strftime('%Y-%m-%d %H:%M:%S.%f')'2009-03-08 09:27:31.807000'

%f 指令仅支持 datetime.datetime.strftime，而不是 time.strftime.

UPDATE 使用 %, str.format:

<预><代码>>>>导入时间>>>s, ms = divmod(1236472051807, 1000) # (1236472051, 807)>>>'%s.%03d' % (time.strftime('%Y-%m-%d %H:%M:%S', time.gmtime(s)), ms)'2009-03-08 00:27:31.807'>>>'{}.{:03d}'.format(time.strftime('%Y-%m-%d %H:%M:%S', time.gmtime(s)), ms)'2009-03-08 00:27:31.807'

I have used a ruby script to convert iso time stamp to epoch, the files that I am parsing has following time stamp structure:

2009-03-08T00:27:31.807

Since I want to keep milliseconds I used following ruby code to convert it to epoch time:

irb(main):010:0> DateTime.parse('2009-03-08T00:27:31.807').strftime("%Q")
=> "1236472051807"

But In python I tried following:

import time 
time.strftime('%Y-%m-%d %H:%M:%S', time.gmtime(1236472051807))

But I don't get the original time date time back,

>>> time.strftime('%Y-%m-%d %H:%M:%S', time.gmtime(1236472051807))
'41152-03-29 02:50:07'
>>> 

I wonder is it related to how I am formatting?

解决方案

Use datetime.datetime.fromtimestamp:

>>> import datetime
>>> s = 1236472051807 / 1000.0
>>> datetime.datetime.fromtimestamp(s).strftime('%Y-%m-%d %H:%M:%S.%f')
'2009-03-08 09:27:31.807000'

%f directive is only supported by datetime.datetime.strftime, not by time.strftime.

UPDATE Alternative using %, str.format:

>>> import time
>>> s, ms = divmod(1236472051807, 1000)  # (1236472051, 807)
>>> '%s.%03d' % (time.strftime('%Y-%m-%d %H:%M:%S', time.gmtime(s)), ms)
'2009-03-08 00:27:31.807'
>>> '{}.{:03d}'.format(time.strftime('%Y-%m-%d %H:%M:%S', time.gmtime(s)), ms)
'2009-03-08 00:27:31.807'

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