如何将"%d/%m/%Y"
格式的字符串转换为时间戳?
"01/12/2011" -> 1322697600
答案 0 :(得分:259)
>>> import time
>>> import datetime
>>> s = "01/12/2011"
>>> time.mktime(datetime.datetime.strptime(s, "%d/%m/%Y").timetuple())
1322697600.0
答案 1 :(得分:35)
将字符串转换为日期对象:
from datetime import date, datetime
date_string = "01/12/2011"
date_object = date(*map(int, reversed(date_string.split("/"))))
assert date_object == datetime.strptime(date_string, "%d/%m/%Y").date()
将日期对象转换为POSIX时间戳的方法取决于时区。来自Converting datetime.date
to UTC timestamp in Python:
日期对象表示UTC的午夜
import calendar
timestamp1 = calendar.timegm(utc_date.timetuple())
timestamp2 = (utc_date.toordinal() - date(1970, 1, 1).toordinal()) * 24*60*60
assert timestamp1 == timestamp2
日期对象表示当地时间的午夜
import time
timestamp3 = time.mktime(local_date.timetuple())
assert timestamp3 != timestamp1 or (time.gmtime() == time.localtime())
时间戳不同,除非UTC的午夜和当地时间是同一时间实例。
答案 2 :(得分:32)
我使用ciso8601
,比日期时间快了62倍。
t = "01/12/2011"
ts = ciso8601.parse_datetime(t)
# to get time in seconds:
time.mktime(ts.timetuple())
您可以了解更多here。
答案 3 :(得分:27)
>>> int(datetime.datetime.strptime('01/12/2011', '%d/%m/%Y').strftime("%s"))
1322683200
答案 4 :(得分:20)
答案还取决于您输入的日期时区。如果您的日期是本地日期,那么您可以使用像katrielalex所说的mktime() - 只是我不明白为什么他使用datetime而不是这个较短的版本:
>>> time.mktime(time.strptime('01/12/2011', "%d/%m/%Y"))
1322694000.0
但请注意我的结果与他不同,因为我可能在不同的TZ中(结果是无时区的UNIX时间戳)
现在,如果输入日期已经是UTC,那么我认为正确的解决方案是:
>>> calendar.timegm(time.strptime('01/12/2011', '%d/%m/%Y'))
1322697600
答案 5 :(得分:8)
只需使用datetime.datetime.strptime
:
import datetime
stime = "01/12/2011"
print(datetime.datetime.strptime(stime, "%d/%m/%Y").timestamp())
结果:
1322697600
要使用UTC而非本地时区,请使用.replace
:
datetime.datetime.strptime(stime, "%d/%m/%Y").replace(tzinfo=datetime.timezone.utc).timestamp()
答案 6 :(得分:6)
答案 7 :(得分:5)
我建议dateutil:
import dateutil.parser
dateutil.parser.parse("01/12/2011", dayfirst=True).timestamp()
答案 8 :(得分:4)
很多这些答案都没有考虑到
开头的日期是天真的说实话,您需要先将天真日期设为时区感知日期时间
import datetime
import pytz
# naive datetime
d = datetime.datetime.strptime('01/12/2011', '%d/%m/%Y')
>>> datetime.datetime(2011, 12, 1, 0, 0)
# add proper timezone
pst = pytz.timezone('America/Los_Angeles')
d = pst.localize(d)
>>> datetime.datetime(2011, 12, 1, 0, 0,
tzinfo=<DstTzInfo 'America/Los_Angeles' PST-1 day, 16:00:00 STD>)
# convert to UTC timezone
utc = pytz.UTC
d = d.astimezone(utc)
>>> datetime.datetime(2011, 12, 1, 8, 0, tzinfo=<UTC>)
# epoch is the beginning of time in the UTC timestamp world
epoch = datetime.datetime(1970,1,1,0,0,0,tzinfo=pytz.UTC)
>>> datetime.datetime(1970, 1, 1, 0, 0, tzinfo=<UTC>)
# get the total second difference
ts = (d - epoch).total_seconds()
>>> 1322726400.0
同时强>
请注意,pytz
tzinfo
datetime.datetime
# Don't do this:
d = datetime.datetime(2011, 12, 1,0,0,0, tzinfo=pytz.timezone('America/Los_Angeles'))
>>> datetime.datetime(2011, 1, 12, 0, 0,
tzinfo=<DstTzInfo 'America/Los_Angeles' LMT-1 day, 16:07:00 STD>)
# tzinfo in not PST but LMT here, with a 7min offset !!!
# when converting to UTC:
d = d.astimezone(pytz.UTC)
>>> datetime.datetime(2011, 1, 12, 7, 53, tzinfo=<UTC>)
# you end up with an offset
对多个时区不起作用。见datetime with pytz timezone. Different offset depending on how tzinfo is set
@objc
答案 9 :(得分:1)
您可以转换为同格式
locals {
create_me = terraform.workspace == "dev" ? 0 : 1
}
resource "aws_acm_certificate" "default" {
count = local.create_me
domain_name = "www.test.uk"
validation_method = "DNS"
}
resource "aws_route53_record" "validation" {
count = local.create_me
name = aws_acm_certificate.default.domain_validation_options[count.index].resource_record_name
type = aws_acm_certificate.default.domain_validation_options[count.index].resource_record_type
zone_id = "Z0725470IF9R8J77LPTU"
records = [
aws_acm_certificate.default.domain_validation_options[count.index].resource_record_value]
ttl = "60"
}
resource "aws_acm_certificate_validation" "default" {
count = local.create_me
certificate_arn = aws_acm_certificate.default[count.index].arn
validation_record_fqdns = [
aws_route53_record.validation[count.index].fqdn,
]
}
答案 10 :(得分:0)
只使用datetime.timestamp(你的datetime instanse),datetime实例包含时区信息,所以时间戳将是标准的utc时间戳。如果你将datetime转换为timetuple,它将失去它的时区,因此结果将是错误的。 如果你想提供一个接口,你应该这样写: int(datetime.timestamp(time_instance))* 1000
答案 11 :(得分:0)
似乎效率很高:
import datetime
day, month, year = '01/12/2011'.split('/')
datetime.datetime(int(year), int(month), int(day)).timestamp()
每回路1.61μs±120 ns(平均值±标准偏差,7次运行,每次100000次循环)
答案 12 :(得分:0)
您可以参考以下链接,以使用strptime
中的datetime.datetime
函数来转换任何格式的日期以及时区。
https://docs.python.org/3/library/datetime.html#strftime-and-strptime-behavior
答案 13 :(得分:0)
获取utctime的简单函数。
r = requests.post('https://api.socialtables.com/4.0/guestlists/965d8450-daf3-
11e9-9e6a-1fbad5325279/guests', data={
"id":"1231231231","first_name":"fname","last_name":"lname","email":"aa@aaa.aa"
})