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?
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'
those are miliseconds, just divide them by 1000, since gmtime expects seconds ...
time.strftime('%Y-%m-%d %H:%M:%S', time.gmtime(1236472051807/1000.0))
Source: Stackoverflow.com