Python datetime utcnow

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Previously, when I needed a real utc now with ISO 8601 format, I used to use the strftime function or the pytz module. But recently I just found that Python at least since v3.5 has already provide it with builtin module: datetime.now(timezone.utc)

PS: datetime.fromisoformat() is release with python v3.7

>>> from datetime import datetime, timezone

>>> datetime.utcnow()
datetime.datetime(2021, 6, 27, 17, 31, 14, 410011)
>>> datetime.utcnow().isoformat()
'2021-06-27T17:31:14.410200'
>>> datetime.fromisoformat(datetime.utcnow().isoformat())
datetime.datetime(2021, 6, 27, 17, 31, 14, 415153)

>>> datetime.now(timezone.utc)
datetime.datetime(2021, 6, 27, 17, 31, 14, 419667, tzinfo=datetime.timezone.utc)
>>> datetime.now(timezone.utc).isoformat()
'2021-06-27T17:31:14.425507+00:00'
>>> datetime.fromisoformat(datetime.now(timezone.utc).isoformat())
datetime.datetime(2021, 6, 27, 17, 31, 14, 431368, tzinfo=datetime.timezone.utc)

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