Edit Domain - handle timezones when tranforming to datetime

Author: PrimozGodec

Orange/widgets/data/oweditdomain.py

@@ -2828,7 +2828,10 @@ def transform(self, c):
 
 def datetime_to_epoch(dti: pd.DatetimeIndex, only_time) -> np.ndarray:
     """Convert datetime to epoch"""
-    delta = dti - (dti.normalize() if only_time else pd.Timestamp("1970-01-01"))
+    # when dti has timezone info also the subtracted timestamp must have it
+    # otherwise subtracting fails
+    initial_ts = pd.Timestamp("1970-01-01", tz=None if dti.tz is None else "UTC")
+    delta = dti - (dti.normalize() if only_time else initial_ts)
     return (delta / pd.Timedelta("1s")).values
 
 

Orange/widgets/data/tests/test_oweditdomain.py

@@ -921,13 +921,18 @@ def test_as_time(self):
         times = (
             ["07.02.2022", "18.04.2021"],  # date only
             ["07.02.2022 01:02:03", "18.04.2021 01:02:03"],  # datetime
+            # datetime with timezone
+            ["2021-02-08 01:02:03+01:00", "2021-02-07 01:02:03+01:00"],
             ["010203", "010203"],  # time
             ["02-07", "04-18"],
         )
-        formats = ["25.11.2021", "25.11.2021 00:00:00", "000000", "11-25"]
+        formats = [
+            "25.11.2021", "25.11.2021 00:00:00", "2021-11-25 00:00:00", "000000", "11-25"
+        ]
         expected = [
             [d("2022-02-07"), d("2021-04-18")],
             [d("2022-02-07 01:02:03"), d("2021-04-18 01:02:03")],
+            [d("2021-02-08 01:02:03+0100"), d("2021-02-07 01:02:03+0100")],
             [d("01:02:03"), d("01:02:03")],
             [d("1900-02-07"), d("1900-04-18")],
         ]