Remove deprecation warning of the utcnow function

[wint3ria]

For my application I tend to create several atmospheric profiles in distributed batches, and my logs are flooded by this deprecation warning

  /[redacted]/lib/python3.12/site-packages/joseki/profiles/util.py:19: DeprecationWarning: datetime.datetime.utcnow() is deprecated and scheduled for removal in a future version. Use timezone-aware objects to represent datetimes in UTC: datetime.datetime.now(datetime.UTC).
    return datetime.datetime.utcnow().replace(microsecond=0).isoformat()

This simple patch fixes the issue by using the latest API as recommended.

[leroyvn]

Hi @wint3ria, thanks for your suggestion. I however think that your proposed fix only applies to Python v3.11 and higher: you need to keep the old implementation for older versions.

So my suggestion is this: in a utility module, implement a now() function that conditionally uses the old or new interface depending on Python version. Something like:

import sys
import datetime

if sys.version_info[1] < 10:
    def now():
        return datetime.datetime.utcnow()
else:
    def now():
        return datetime.datetime.now(datetime.UTC)

[wint3ria]

Thank you for the review. To streamline the work and avoid extra back and forth, I suggest to wait for me to mark the PR as ready. Unless you need this to be done within a specific deadline?

As per our last discussion about it, I couldn't find a proper backport, checking the version manually seems then to be the solution, indeed.

[leroyvn]

The reason to mark the PR as ready to trigger CI, happy to switch it back to draft, of course. No deadline, no.