GH1264 Version 2.0 cleanup

pandas-stubs/core/indexes/base.pyi

@@ -347,11 +347,16 @@ class Index(IndexOpsMixin[S1]):
     def __neg__(self) -> Self: ...
     def __nonzero__(self) -> None: ...
     __bool__ = ...
-    def union(self, other: list[HashableT] | Index, sort=...) -> Index: ...
-    def intersection(self, other: list[S1] | Self, sort: bool = ...) -> Self: ...
-    def difference(self, other: list | Index, sort: bool | None = None) -> Self: ...
+    def union(
+        self, other: list[HashableT] | Self, sort: bool | None = ...
+    ) -> Index: ...
+    def intersection(self, other: list[S1] | Self, sort: bool | None = ...) -> Self: ...
+    def difference(self, other: list | Self, sort: bool | None = None) -> Self: ...
     def symmetric_difference(
-        self, other: list[S1] | Self, result_name: Hashable = ..., sort=...
+        self,
+        other: list[S1] | Self,
+        result_name: Hashable = ...,
+        sort: bool | None = ...,
     ) -> Self: ...
     def get_loc(
         self,
@@ -472,5 +477,6 @@ class Index(IndexOpsMixin[S1]):
             | Sequence[float]
         ),
     ) -> Self: ...
+    def infer_objects(self, copy: bool = ...) -> Self: ...
 
 UnknownIndex: TypeAlias = Index[Any]

pandas-stubs/core/indexes/multi.pyi

@@ -155,7 +155,7 @@ class MultiIndex(Index):
     def equal_levels(self, other): ...
     def union(self, other, sort=...): ...  # pyrefly: ignore
     def intersection(  # pyright: ignore[reportIncompatibleMethodOverride]
-        self, other: list | Self, sort: bool = ...
+        self, other: list | Self, sort: bool | None = ...
     ): ...
     def difference(self, other, sort=...): ...
     def astype(self, dtype: DtypeArg, copy: bool = ...) -> Self: ...

pandas-stubs/core/series.pyi

@@ -1739,9 +1739,18 @@ class Series(IndexOpsMixin[S1], NDFrame):
         *args: Any,
         **kwargs: Any,
     ) -> Series[S1]: ...
+    @overload
+    def cumprod(
+        self: Series[_str],
+        axis: AxisIndex = ...,
+        skipna: _bool = ...,
+        *args: Any,
+        **kwargs: Any,
+    ) -> Never: ...
+    @overload
     def cumprod(
         self,
-        axis: AxisIndex | None = ...,
+        axis: AxisIndex = ...,
         skipna: _bool = ...,
         *args: Any,
         **kwargs: Any,
@@ -2219,6 +2228,13 @@ class TimestampSeries(Series[Timestamp]):
         **kwargs: Any,
     ) -> Timedelta: ...
     def diff(self, periods: int = ...) -> TimedeltaSeries: ...  # type: ignore[override] # pyright: ignore[reportIncompatibleMethodOverride]
+    def cumprod(
+        self,
+        axis: AxisIndex = ...,
+        skipna: _bool = ...,
+        *args: Any,
+        **kwargs: Any,
+    ) -> Never: ...
 
 class TimedeltaSeries(Series[Timedelta]):
     # ignores needed because of mypy
@@ -2324,12 +2340,26 @@ class TimedeltaSeries(Series[Timedelta]):
         *args: Any,
         **kwargs: Any,
     ) -> TimedeltaSeries: ...
+    def cumprod(
+        self,
+        axis: AxisIndex = ...,
+        skipna: _bool = ...,
+        *args: Any,
+        **kwargs: Any,
+    ) -> Never: ...
 
 class PeriodSeries(Series[Period]):
     @property
     def dt(self) -> PeriodProperties: ...  # type: ignore[override] # pyright: ignore[reportIncompatibleMethodOverride]
     def __sub__(self, other: PeriodSeries) -> OffsetSeries: ...  # type: ignore[override] # pyright: ignore[reportIncompatibleMethodOverride]
     def diff(self, periods: int = ...) -> OffsetSeries: ...  # type: ignore[override] # pyright: ignore[reportIncompatibleMethodOverride]
+    def cumprod(
+        self,
+        axis: AxisIndex = ...,
+        skipna: _bool = ...,
+        *args: Any,
+        **kwargs: Any,
+    ) -> Never: ...
 
 class OffsetSeries(Series[BaseOffset]):
     @overload  # type: ignore[override]
@@ -2338,6 +2368,13 @@ class OffsetSeries(Series[BaseOffset]):
     def __radd__(  # pyright: ignore[reportIncompatibleMethodOverride]
         self, other: BaseOffset
     ) -> OffsetSeries: ...
+    def cumprod(
+        self,
+        axis: AxisIndex = ...,
+        skipna: _bool = ...,
+        *args: Any,
+        **kwargs: Any,
+    ) -> Never: ...
 
 class IntervalSeries(Series[Interval[_OrderableT]], Generic[_OrderableT]):
     @property

tests/test_indexes.py

@@ -172,6 +172,10 @@ def test_difference_none() -> None:
     # GH 253
     check(assert_type(ind.difference([1]), "pd.Index[int]"), pd.Index)
 
+    # check with sort parameter
+    check(assert_type(ind.difference([1, None], sort=False), "pd.Index[int]"), pd.Index)
+    check(assert_type(ind.difference([1], sort=True), "pd.Index[int]"), pd.Index)
+
 
 def test_str_split() -> None:
     # GH 194
@@ -314,6 +318,18 @@ def test_range_index_union():
     )
 
 
+def test_index_union_sort() -> None:
+    """Test sort argument in pd.Index.union GH1264."""
+    check(
+        assert_type(pd.Index(["e", "f"]).union(["a", "b", "c"], sort=True), pd.Index),
+        pd.Index,
+    )
+    check(
+        assert_type(pd.Index(["e", "f"]).union(["a", "b", "c"], sort=False), pd.Index),
+        pd.Index,
+    )
+
+
 def test_range_index_start_stop_step():
     idx = pd.RangeIndex(3)
     check(assert_type(idx.start, int), int)
@@ -1361,3 +1377,10 @@ def test_index_dict() -> None:
         ),
         pd.TimedeltaIndex,
     )
+
+
+def test_index_infer_objects() -> None:
+    """Test infer_objects method on Index."""
+    df = pd.DataFrame({"A": ["a", 1, 2, 3]})
+    idx = df.set_index("A").index[1:]
+    check(assert_type(idx.infer_objects(), pd.Index), pd.Index)

tests/test_series.py

@@ -3941,3 +3941,37 @@ def test_series_index_type() -> None:
 
     if TYPE_CHECKING_INVALID_USAGE:
         t = pd.Series([1, 2], index="ab")  # type: ignore[call-overload] # pyright: ignore[reportCallIssue, reportArgumentType]
+
+
+def test_timedelta_index_cumprod() -> None:
+    dates = pd.Series(
+        [
+            pd.Timestamp("2020-01-01"),
+            pd.Timestamp("2020-01-15"),
+            pd.Timestamp("2020-02-01"),
+        ],
+        dtype="datetime64[ns]",
+    )
+    as_period_series = pd.Series(pd.PeriodIndex(dates, freq="M"))
+
+    offset_series = as_period_series - as_period_series
+
+    if TYPE_CHECKING_INVALID_USAGE:
+        assert_type(pd.Series(["a", "b"]).cumprod(), Never)
+
+    if TYPE_CHECKING_INVALID_USAGE:
+        assert_type(offset_series.cumprod(), Never)
+
+    if TYPE_CHECKING_INVALID_USAGE:
+        assert_type(pd.Series([pd.Timedelta(0), pd.Timedelta(1)]).cumprod(), Never)
+
+    if TYPE_CHECKING_INVALID_USAGE:
+        assert_type(
+            pd.Series(
+                [pd.Timestamp("2024-04-29"), pd.Timestamp("2034-08-28")]
+            ).cumprod(),
+            Never,
+        )
+
+    if TYPE_CHECKING_INVALID_USAGE:
+        assert_type(as_period_series.cumprod(), Never)