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Description: datetime does not work with non-constant pytz.timezone
This has always been the case (and is explicitly warned about
in the pytz documentation), but became a test fail when
tzdata 2024b changed 'CET' and similar to aliases.
Author: Rebecca N. Palmer <rebecca_palmer@zoho.com>
Forwarded: no
--- a/pandas/tests/arrays/test_array.py
+++ b/pandas/tests/arrays/test_array.py
@@ -272,7 +272,8 @@ def test_array_copy():
assert tm.shares_memory(a, b)
-cet = pytz.timezone("CET")
+cetfixed = pytz.timezone("Etc/GMT-1") # the wrong-looking sign is because Etc/* use posix convention, as described in the tzdata source
+cetwithdst = pytz.timezone("Europe/Brussels")
@pytest.mark.parametrize(
@@ -313,11 +314,20 @@ cet = pytz.timezone("CET")
),
(
[
- datetime.datetime(2000, 1, 1, tzinfo=cet),
- datetime.datetime(2001, 1, 1, tzinfo=cet),
+ datetime.datetime(2000, 1, 1, tzinfo=cetfixed),
+ datetime.datetime(2001, 1, 1, tzinfo=cetfixed),
],
DatetimeArray._from_sequence(
- ["2000", "2001"], dtype=pd.DatetimeTZDtype(tz=cet, unit="ns")
+ ["2000", "2001"], dtype=pd.DatetimeTZDtype(tz=cetfixed, unit="ns")
+ ),
+ ),
+ (
+ [
+ cetwithdst.localize(datetime.datetime(2000, 1, 1)),
+ cetwithdst.localize(datetime.datetime(2001, 1, 1)),
+ ],
+ DatetimeArray._from_sequence(
+ ["2000", "2001"], dtype=pd.DatetimeTZDtype(tz=cetwithdst, unit="ns")
),
),
# timedelta
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