GH 956 Allowing sequence type in to_timedelta

Author: loicdiridollou

pandas-stubs/core/tools/timedeltas.pyi

@@ -31,7 +31,7 @@ def to_timedelta(
 @overload
 def to_timedelta(
     arg: (
-        Sequence[float | timedelta]
+        Sequence[str | float | timedelta]
         | list[str | float | timedelta]
         | tuple[str | float | timedelta, ...]
         | range

tests/test_timefuncs.py

@@ -140,6 +140,15 @@ def test_timedelta_series_arithmetic() -> None:
     r4: pd.TimedeltaIndex = tds1 / 10.2
 
 
+def test_timedelta_series_string() -> None:
+    tds1: pd.TimedeltaIndex = pd.to_timedelta(["1 day"])
+    td1: pd.Timedelta = pd.Timedelta("2 days")
+    r1: pd.TimedeltaIndex = tds1 + td1
+    r2: pd.TimedeltaIndex = tds1 - td1
+    r3: pd.TimedeltaIndex = tds1 * 4.3
+    r4: pd.TimedeltaIndex = tds1 / 10.2
+
+
 def test_timestamp_timedelta_series_arithmetic() -> None:
     ts1 = pd.to_datetime(pd.Series(["2022-03-05", "2022-03-06"]))
     assert isinstance(ts1.iloc[0], pd.Timestamp)