Generate RFC 3339 timestamp in Python [duplicate]

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UPDATE 2021

In Python 3.2 timezone was added to the datetime module allowing you to easily assign a timezone to UTC.

>>> import datetime
>>> n = datetime.datetime.now(datetime.timezone.utc)
>>> n.isoformat()
'2021-07-13T15:28:51.818095+00:00'

previous answer:

Timezones are a pain, which is probably why they chose not to include them in the datetime library.

try pytz, it has the tzinfo your looking for:
http://pytz.sourceforge.net/

You need to first create the datetime object, then apply the timezone like as below, and then your .isoformat() output will include the UTC offset as desired:

d = datetime.datetime.utcnow()
d_with_timezone = d.replace(tzinfo=pytz.UTC)
d_with_timezone.isoformat()

‘2017-04-13T14:34:23.111142+00:00’

Or, just use UTC, and throw a “Z” (for Zulu timezone) on the end to mark the “timezone” as UTC.

d = datetime.datetime.utcnow() # <-- get time in UTC
print d.isoformat("T") + "Z"

‘2017-04-13T14:34:23.111142Z’

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