#🔒 Simplest way to parse string to hard UTC datetime

27 messages · Page 1 of 1 (latest)

sudden basinBOT
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@acoustic venture

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modern spear
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U can use from datetime import datetime, timezone datetime.now(timezone.utc)

tulip kettle
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You can also import the const UTC
from datetime import datetime, UTC

weary pilot
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If there's not a Z, the string is considered naive. If it ends with a Z, it's implied to be UTC

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datetime.strptime("2024-07-24T07:46:32", "%Y-%m-%dT%H:%M:%S").replace(tzinfo=UTC)
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It's usually better to use datetime.fromtimestamp(unixtime, UTC)

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or even fromisoformat

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>>> datetime.fromisoformat("2024-07-24T07:46:32")
datetime.datetime(2024, 7, 24, 7, 46, 32)
>>> datetime.fromisoformat("2024-07-24T07:46:32Z")
datetime.datetime(2024, 7, 24, 7, 46, 32, tzinfo=datetime.timezone.utc)
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that's basically what your string is anyway

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Basic example of what you want: ```py
dt = datetime.fromisoformat(ts)
if dt.tzinfo is None or dt.tzinfo.utcoffset(None) is None:
dt = dt.replace(tzinfo=UTC)

#force to utc
dt = dt.astimezone(UTC)

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it's not an in-place operation. You must reassign it back

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Adding Z makes it utc

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.astimezone() converts it to a local naive time

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What python version are you using?

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works in 3.12

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This works. ```py

datetime.fromisoformat("2024-07-24T07:46:32+00:00")
datetime.datetime(2024, 7, 24, 7, 46, 32, tzinfo=datetime.timezone.utc)

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Looks like Z support was added in 3.11

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Any version before that is considered bugged

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!pip backports-datetime-fromisoformat

sudden basinBOT
weary pilot
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I guess you don't strictly need it unless you want to support the full standard

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If you only consume dates produced by dt.isoformat(), you'll be fine

weary pilot
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str(dt.tzinfo)

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>>> str(datetime.fromisoformat("2024-07-24T07:46:32+00:00").tzinfo)
'UTC'
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tzinfo will equal datetime.UTC

sudden basinBOT
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