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IIRC, arrow usually calls dateutil to parse dates anyway, and there are many other, lighter dependencies that will parse an ISO 8601 date quickly into a datetime.datetime object.

I still think it's reasonable for the .isoformat() operation to have an inverse operation in the standard library.

On November 28, 2017 3:45:41 PM EST, Skip Montanaro wrote:
 I think the latest version can now strptime offsets of the form ±HH:MM with
 %z, so there's no longer anything blocking you from parsing from all
 isoformat() outputs with strptime, provided you know which one you need.

Or just punt and install arrow:

 import arrow
 arrow.get('2017-10-20T08:20:08.986166+00:00')

 arrow.get('2017-10-20T08:20:08.986166+00:00').datetime
datetime.datetime(2017, 10, 20, 8, 20, 8, 986166, tzinfo=tzoffset(None, 0))

Skip