How to get the seconds since epoch from the time date output of gmtime

Question

How do you do reverse gmtime    where you put the time   date and get the number of seconds   I have strings like  Jul 9  2009   20 02 58 UTC   and I want to get back the number of seconds between the epoch and July 9  2009   I have tried time strftime but I don t know how to use it properly  or if it is the correct command to use

User · Accepted Answer

If you got here because a search engine told you this is how to get the Unix timestamp, stop reading this answer. Scroll down one.

If you want to reverse time.gmtime(), you want calendar.timegm().

>>> calendar.timegm(time.gmtime())
1293581619.0

You can turn your string into a time tuple with time.strptime(), which returns a time tuple that you can pass to calendar.timegm():

>>> import calendar
>>> import time
>>> calendar.timegm(time.strptime('Jul 9, 2009 @ 20:02:58 UTC', '%b %d, %Y @ %H:%M:%S UTC'))
1247169778

More information about calendar module here

User · Answer

There are two ways  depending on your original timestamp   mktime   and timegm    http   docs python org library time html

User · Answer

Note that time gmtime maps timestamp 0 to 1970-1-1 00 00 00   In  61   import time        In  63   time gmtime 0  Out 63   time struct time tm year 1970  tm mon 1  tm mday 1  tm hour 0  tm min 0  tm sec 0  tm wday 3  tm yday 1  tm isdst 0    time mktime time gmtime 0   gives you a timestamp shifted by an amount that depends on your locale  which in general may not be 0    In  64   time mktime time gmtime 0   Out 64   18000 0   The inverse of time gmtime is calendar timegm   In  62   import calendar     In  65   calendar timegm time gmtime 0   Out 65   0

User · Answer

ep   datetime datetime 1970 1 1 0 0 0  x    datetime datetime utcnow  - ep  total seconds     This should be different from int time time     but it is safe to use something like x    60 60 24   datetime     Basic date and time types          Unlike the time module  the datetime module does not support leap seconds

User · Answer

Use the time module   epoch time   int time time

User · Answer

t   datetime strptime  Jul 9  2009   20 02 58 UTC    b  d   Y    H  M  S  Z

[python] How to get the seconds since epoch from the time + date output of gmtime()?

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