在 Python 中将 ISO 8601 日期时间转换为秒
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Converting ISO 8601 date time to seconds in Python
提问by Zaynaib Giwa
I am trying to add two times together. The ISO 8601 time stamp is '1984-06-02T19:05:00.000Z', and I would like to convert it to seconds. I tried using the Python module iso8601, but it is only a parser.
我试图加在一起两次。ISO 8601 时间戳是“1984-06-02T19:05:00.000Z”，我想将其转换为秒。我尝试使用 Python 模块iso8601，但它只是一个解析器。
Any suggestions?
有什么建议？
采纳答案by heyitschun
If you want to get the seconds since epoch, you can use python-dateutilto convert it to a datetimeobject and then convert it so seconds using the strftimemethod. Like so:
如果您想获得自纪元以来的秒数，您可以使用python-dateutil将其转换为datetime对象，然后使用该strftime方法将其转换为秒数。像这样：
>>> import dateutil.parser as dp
>>> t = '1984-06-02T19:05:00.000Z'
>>> parsed_t = dp.parse(t)
>>> t_in_seconds = parsed_t.strftime('%s')
>>> t_in_seconds
'455047500'
So you were halfway there :)
所以你已经成功了一半 :)
回答by jfs
Your date is UTC time in RFC 3339 format, you could parse it using only stdlib:
您的日期是RFC 3339 格式的UTC 时间，您可以仅使用 stdlib 解析它：
from datetime import datetime
utc_dt = datetime.strptime('1984-06-02T19:05:00.000Z', '%Y-%m-%dT%H:%M:%S.%fZ')
# Convert UTC datetime to seconds since the Epoch
timestamp = (utc_dt - datetime(1970, 1, 1)).total_seconds()
# -> 455051100.0
See also Converting datetime.date to UTC timestamp in Python
另请参阅在 Python 中将 datetime.date 转换为 UTC 时间戳
How do I convert it back to ISO 8601 format?
如何将其转换回 ISO 8601 格式？
To convert POSIX timestamp back, create a UTC datetime object from it, and format it using .strftime()method:
要将 POSIX 时间戳转换回来，请从中创建一个 UTC 日期时间对象，并使用以下.strftime()方法对其进行格式化：
from datetime import datetime, timedelta
utc_dt = datetime(1970, 1, 1) + timedelta(seconds=timestamp)
print(utc_dt.strftime('%Y-%m-%dT%H:%M:%S.%fZ'))
# -> 1984-06-02T19:05:00.000000Z
Note: It prints six digits after the decimal point (microseconds). To get three digits, see Formatting microseconds to 2 decimal places (in fact converting microseconds into tens of microseconds).
注意：它在小数点后打印六位数字（微秒）。要获得三位数字，请参阅将微秒格式化为 2 个小数位（实际上将微秒转换为几十微秒）。
回答by toppk
Here is a solution in Python 3:
这是 Python 3 中的解决方案：
$ date +%s
1428030452
$ TZ=US/Pacific date -d @1428030452 '+%Y%m%d %H:%M:%S %z'
20150402 20:07:32 -0700
$ TZ=US/Eastern date -d @1428030452 '+%Y%m%d %H:%M:%S %z'
20150402 23:07:32 -0400
$ python3
>>> from datetime import datetime,timezone
>>> def iso2epoch(ts):
... return int(datetime.strptime(ts[:-6],"%Y%m%d %H:%M:%S").replace(tzinfo=timezone.utc).timestamp()) - (int(ts[-2:])*60 + 60 * 60 * int(ts[-4:-2]) * int(ts[-5:-4]+'1'))
...
>>> iso2epoch("20150402 20:07:32 -0700")
1428030452
>>> iso2epoch("20150402 23:07:32 -0400")
1428030452
>>>
