added right order of __add__ overlay and testcases

Author: shirzady1934

pandas-stubs/core/series.pyi

@@ -1577,9 +1577,19 @@ class Series(IndexOpsMixin[S1], NDFrame):
     # just failed to generate these so I couldn't match
     # them up.
     @overload
-    def __add__(self, other: S1 | Self) -> Self: ...
+    def __add__(self: Series[int], other: int) -> Series[int]: ...
+    @overload
+    def __add__(self: Series[int], other: float) -> Series[float]: ...
+    @overload
+    def __add__(self: Series[int], other: complex) -> Series[complex]: ...
+    @overload
+    def __add__(self: Series[float], other: int) -> Series[float]: ...
     @overload
-    def __add__(self, other: complex) -> Series[complex]: ...
+    def __add__(self: Series[float], other: float) -> Series[float]: ...
+    @overload
+    def __add__(self: Series[float], other: complex) -> Series[complex]: ...
+    @overload
+    def __add__(self, other: S1 | Self) -> Self: ...
     @overload
     def __add__(
         self,

tests/test_series.py

@@ -3543,6 +3543,14 @@ def test_series_add_complex() -> None:
     s = pd.Series([1.0, 2.0, 3.0])
     check(assert_type(s + c, "pd.Series[complex]"), pd.Series)
 
+    c1 = 1
+    s1 = pd.Series([1.0, 2.0, 3.0])
+    check(assert_type(s1 + c1, "pd.Series[float]"), pd.Series)
+
+    c2 = 1
+    s2 = pd.Series([1, 2, 3])
+    check(assert_type(s2 + c2, "pd.Series[int]"), pd.Series)
+
 
 def test_series_reindex_like() -> None:
     s = pd.Series([1, 2, 3], index=[0, 1, 2])