Hynek Schlawack

Why did nobody tell me that in #Python 3.11, datetime.fromisoformat() can parse arbitrary ISO timestamps!? #gameChanger

(Before it could only parse the output from datetime.isoformat(); e.g. choking on timestamps ending with a Z for UTC.)

Nov 19, 2022 at 9:33amWeb
Show threadStephen ThorneNov 19, 2022

@hynek someone made me review this because of my ranting about ISO 8601.

It's not bad. It's not complete: but no one actually wants a complete parser for that awful trash standard.

Show threadforsbergNov 19, 2022
@hynek Well, many thanks for telling me! 😀 This have irritated me so many times!
Show threadDaniel 🏳️‍🌈 Jilg Nov 20, 2022
@hynek @rixx ooh this is cool!! If that’s true I can delete at least a hundred lines of code 😍
Show threadMark AsbachNov 20, 2022
@hynek Is there a chance to have this available in older releases (3.7+) somehow? Parsing ISO timestamps an issue I encounter in so many projects. Of course the issue is not only lexical variations but also subtleties like ECMAscript behavior for 24:00 and such nasties …
Show threadHynek SchlawackNov 20, 2022
@ma I use https://dateutil.readthedocs.io/en/stable/parser.html#dateutil.parser.isoparse on older Pythons
parser — dateutil 2.8.2 documentation

Show threadMark AsbachNov 20, 2022
@hynek That’s what I do currently, too. I was just wondering if there is an *identically behaving* implementation available as an independent module (like it was for e.g. argparse), so I would have just one if around the import and will not run into runtime differences … Because otherwise I will continue to use dateutil on all versions, including 3.11+ until 3.11 is the oldest supported version around.
Show threadrudimNov 20, 2022

@hynek

@rixx

Sorry, my Nana wasn't well, and the dog ate my homework... I just forgot.

Show threadStefan ScherfkeNov 21, 2022
@hynek Where exactly can I find "fromisotimestamp()"? I tried homebrew py3.11.0 and it is neither in "datetime" nor in "datetime.datetime". I also can't find it in the docs.
Show threadTin TvrtkovićNov 21, 2022
@sscherfke @hynek https://docs.python.org/3/library/datetime.html#datetime.datetime.fromisoformat ?
datetime — Basic date and time types

Source code: Lib/datetime.py The datetime module supplies classes for manipulating dates and times. While date and time arithmetic is supported, the focus of the implementation is on efficient attr...

Python documentation
Show threadHynek SchlawackNov 21, 2022
@sscherfke I love how everyone autocorrected it in their heads except you :D
Show threadStefan ScherfkeNov 21, 2022
@hynek I am like a computer. I take literally what you give me. 🤪🤖
Show threadAled TreharneNov 26, 2022
@hynek @sscherfke Good grief, I didn't even notice 🤣