一个获取UNIX纪元时间的简单函数。

注意:此函数假设输入日期时间为UTC格式(请参阅此处的注释)。

def utctimestamp(ts: str, DATETIME_FORMAT: str = "%d/%m/%Y"):
    import datetime, calendar
    ts = datetime.datetime.utcnow() if ts is None else datetime.datetime.strptime(ts, DATETIME_FORMAT)
    return calendar.timegm(ts.utctimetuple())

用法:

>>> utctimestamp("01/12/2011")
1322697600
>>> utctimestamp("2011-12-01", "%Y-%m-%d")
1322697600

你可以从两个方向，unix epoch <==> datetime:

import datetime
import time


the_date = datetime.datetime.fromtimestamp( 1639763585 )



unix_time = time.mktime(the_date.timetuple())

assert  ( the_date == datetime.datetime.fromtimestamp(unix_time) ) & \
        ( time.mktime(the_date.timetuple()) == unix_time         )   

使用datetime即可。时间戳(您的datetime实例)，datetime实例包含时区信息，因此时间戳将是标准utc时间戳。如果您将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

>>> int(datetime.datetime.strptime('01/12/2011', '%d/%m/%Y').strftime("%s"))
1322683200

很多答案都没有考虑到日期一开始就很天真

为了正确，您需要首先将初始日期设置为具有时区意识的datetime

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

另外:

小心，在datetime中使用pytz for tzinfo。datetime不适用于许多时区。参见datetime with pytz timezone。不同的偏移量取决于tzinfo的设置方式

# 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

https://en.wikipedia.org/wiki/Local_mean_time

>>> import time
>>> import datetime
>>> s = "01/12/2011"
>>> time.mktime(datetime.datetime.strptime(s, "%d/%m/%Y").timetuple())
1322697600.0