GH1089 Fix pow operator on Series[int] with float exponent

Author: loicdiridollou

pandas-stubs/core/series.pyi

@@ -1894,6 +1894,15 @@ class Series(IndexOpsMixin[S1], NDFrame):
         axis: AxisIndex = ...,
     ) -> Series[_bool]: ...
     def nunique(self, dropna: _bool = ...) -> int: ...
+    @overload
+    def pow(
+        self: Series[int],
+        other: float,
+        level: Level | None = ...,
+        fill_value: float | None = ...,
+        axis: AxisIndex | None = ...,
+    ) -> Series[float]: ...
+    @overload
     def pow(
         self,
         other: num | _ListLike | Series[S1],

tests/test_series.py

@@ -714,7 +714,7 @@ def test_types_scalar_arithmetic() -> None:
     check(assert_type(s**2, "pd.Series[int]"), pd.Series, np.integer)
     check(assert_type(s**0, "pd.Series[int]"), pd.Series, np.integer)
     check(assert_type(s**0.213, "pd.Series[int]"), pd.Series, np.float64)
-    check(assert_type(s.pow(0.5), "pd.Series[int]"), pd.Series, np.float64)
+    check(assert_type(s.pow(0.5), "pd.Series[float]"), pd.Series, np.float64)
 
 
 # GH 103