create - python datetime to string

¿Cómo puedo convertir un objeto de fecha y hora en milisegundos desde la época(tiempo de Unix) en Python?

Question

Tengo un objeto datetime Python que quiero convertir a tiempo de Unix, o segundos / milisegundos desde la época de 1970.

¿Cómo hago esto?

Answer 1

¡Puedes usar Delorean para viajar en el espacio y el tiempo!

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

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

Answer 2

Aquí hay otra forma de solución con la normalización de su objeto de tiempo:

def to_unix_time(timestamp):
    epoch = datetime.datetime.utcfromtimestamp(0) # start of epoch time
    my_time = datetime.datetime.strptime(timestamp, "%Y/%m/%d %H:%M:%S.%f") # plugin your time object
    delta = my_time - epoch
    return delta.total_seconds() * 1000.0

Answer 3

Aquí hay una función que hice basada en la respuesta anterior.

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;
    } 

Puede ajustar el valor devuelto de esta manera: str (int (res)) Para devolverlo sin un valor decimal para usarlo como cadena o solo int (sin el str)

Answer 4

Así es como lo hago:

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

Answer 5

En Python 3.3, agregue nuevo método.

datetime.timestamp()

https://docs.python.org/3.3/library/datetime.html#datetime.datetime.timestamp

Answer 6

Esta otra solución para datetime encubierta a 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; }

Answer 7

Me parece que la forma más sencilla de hacer esto es

import datetime

epoch = datetime.datetime.utcfromtimestamp(0)

def unix_time_millis(dt):
    return (dt - epoch).total_seconds() * 1000.0

Answer 8

Recomendaciones de los documentos de Python 2.7 para el módulo de time

Answer 9

Un poco de código de pandas:

import pandas

def to_millis(dt):
    return int(pandas.to_datetime(dt).value / 1000000)

Answer 10

>>> import datetime
>>> # replace datetime.datetime.now() with your datetime object
>>> int(datetime.datetime.now().strftime("%s")) * 1000 
1312908481000

O la ayuda del módulo horario (y sin formato de fecha):

>>> import datetime, time
>>> # replace datetime.datetime.now() with your datetime object
>>> time.mktime(datetime.datetime.now().timetuple()) * 1000
1312908681000.0

Respondido con ayuda de: http://pleac.sourceforge.net/pleac_python/datesandtimes.html

Documentación:

• time.mktime
• datetime.timetuple

Answer 11

>>> 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

Answer 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))

Answer 13

import time
seconds_since_epoch = time.mktime(your_datetime.timetuple()) * 1000