Python 3.12.0b1: datetime.utcfromtimestamp() is deprecated and scheduled for removal in a future version

[Jun Omae]

The following is warned on calling parse_date with Python 3.12.

trac/util/datefmt.py:646: DeprecationWarning: datetime.utcfromtimestamp() is deprecated and scheduled for removal in a future version. Use timezone-aware objects to represent datetimes in UTC: datetime.fromtimestamp(timestamp, datetime.UTC).
  datetime.utcfromtimestamp(ts)

See also: ​https://docs.python.org/3.12/library/datetime.html?highlight=deprecated#datetime.datetime.utcfromtimestamp

Patch:

trac/util/datefmt.py

@@ -639 +639 @@
                     date=text, hint=formatted_hint, isohint=isohint)
         raise TracError(msg, _('Invalid Date'))
     # Make sure we can convert it to a timestamp and back -
-    # utcfromtimestamp() may raise OverflowError and OSError if out of
+    # fromtimestamp(..., utc) may raise OverflowError and OSError if out of
     # range by platform C gmtime() and gmtime() failure
     ts = to_timestamp(dt)
     try:
-        datetime.utcfromtimestamp(ts)
+        datetime.fromtimestamp(ts, utc)
     except (ValueError, OverflowError, OSError):
         raise TracError(_('The date "%(date)s" is outside valid range. '
                           'Try a date closer to present time.', date=text),

[Jun Omae]

Fixed in [17707].