How can I convert a datetime object to milliseconds since epoch (unix time) in Python?

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臣服心动
臣服心动 2020-11-22 07:49

I have a Python datetime object that I want to convert to unix time, or seconds/milliseconds since the 1970 epoch.

How do I do this?

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  • 2020-11-22 08:02

    You can use Delorean to travel in space and time!

    import datetime
    import delorean
    dt = datetime.datetime.utcnow()
    delorean.Delorean(dt, timezone="UTC").epoch
    

    http://delorean.readthedocs.org/en/latest/quickstart.html  

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  • 2020-11-22 08:04

    This is how I do it:

    from datetime import datetime
    from time import mktime
    
    dt = datetime.now()
    sec_since_epoch = mktime(dt.timetuple()) + dt.microsecond/1000000.0
    
    millis_since_epoch = sec_since_epoch * 1000
    
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  • 2020-11-22 08:04
    import time
    seconds_since_epoch = time.mktime(your_datetime.timetuple()) * 1000
    
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  • 2020-11-22 08:08
    >>> import datetime
    >>> import time
    >>> import calendar
    
    >>> #your datetime object
    >>> now = datetime.datetime.now()
    >>> now
    datetime.datetime(2013, 3, 19, 13, 0, 9, 351812)
    
    >>> #use datetime module's timetuple method to get a `time.struct_time` object.[1]
    >>> tt = datetime.datetime.timetuple(now)
    >>> tt
    time.struct_time(tm_year=2013, tm_mon=3, tm_mday=19, tm_hour=13, tm_min=0, tm_sec=9,     tm_wday=1, tm_yday=78, tm_isdst=-1)
    
    >>> #If your datetime object is in utc you do this way. [2](see the first table on docs)
    >>> sec_epoch_utc = calendar.timegm(tt) * 1000
    >>> sec_epoch_utc
    1363698009
    
    >>> #If your datetime object is in local timeformat you do this way
    >>> sec_epoch_loc = time.mktime(tt) * 1000
    >>> sec_epoch_loc
    1363678209.0
    

    [1] http://docs.python.org/2/library/datetime.html#datetime.date.timetuple

    [2] http://docs.python.org/2/library/time.html

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  • 2020-11-22 08:08

    This other solution for covert datetime to unixtimestampmillis.

    private static readonly DateTime UnixEpoch = new DateTime(1970, 1, 1, 0, 0, 0, DateTimeKind.Utc);
    
        public static long GetCurrentUnixTimestampMillis()
        {
            DateTime localDateTime, univDateTime;
            localDateTime = DateTime.Now;          
            univDateTime = localDateTime.ToUniversalTime();
            return (long)(univDateTime - UnixEpoch).TotalMilliseconds;
        } 
    
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  • 2020-11-22 08:12
    from datetime import datetime
    from calendar import timegm
    
    # Note: if you pass in a naive dttm object it's assumed to already be in UTC
    def unix_time(dttm=None):
        if dttm is None:
           dttm = datetime.utcnow()
    
        return timegm(dttm.utctimetuple())
    
    print "Unix time now: %d" % unix_time()
    print "Unix timestamp from an existing dttm: %d" % unix_time(datetime(2014, 12, 30, 12, 0))
    
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