Add some missing Optional type annotations to interval_range and read_sql (#1315)

add some missing Optional type annotations

Author: MarcoGorelli

pandas-stubs/core/indexes/interval.pyi

@@ -310,59 +310,17 @@ class IntervalIndex(ExtensionIndex[IntervalT], IntervalMixin):
 # int gets hit first and so the correct type is returned
 @overload
 def interval_range(  # pyright: ignore[reportOverlappingOverload]
-    start: int = ...,
-    end: int = ...,
-    periods: int | None = ...,
-    freq: int | None = ...,
-    name: Hashable = ...,
-    closed: IntervalClosedType = ...,
-) -> IntervalIndex[Interval[int]]: ...
-
-# Overlaps since int is a subclass of float
-@overload
-def interval_range(  # pyright: ignore[reportOverlappingOverload]
-    start: int,
-    *,
-    end: None = ...,
-    periods: int | None = ...,
-    freq: int | None = ...,
-    name: Hashable = ...,
-    closed: IntervalClosedType = ...,
-) -> IntervalIndex[Interval[int]]: ...
-@overload
-def interval_range(  # pyright: ignore[reportOverlappingOverload]
-    *,
-    start: None = ...,
-    end: int,
+    start: int | None = ...,
+    end: int | None = ...,
     periods: int | None = ...,
     freq: int | None = ...,
     name: Hashable = ...,
     closed: IntervalClosedType = ...,
 ) -> IntervalIndex[Interval[int]]: ...
 @overload
 def interval_range(
-    start: float = ...,
-    end: float = ...,
-    periods: int | None = ...,
-    freq: int | None = ...,
-    name: Hashable = ...,
-    closed: IntervalClosedType = ...,
-) -> IntervalIndex[Interval[float]]: ...
-@overload
-def interval_range(
-    start: float,
-    *,
-    end: None = ...,
-    periods: int | None = ...,
-    freq: int | None = ...,
-    name: Hashable = ...,
-    closed: IntervalClosedType = ...,
-) -> IntervalIndex[Interval[float]]: ...
-@overload
-def interval_range(
-    *,
-    start: None = ...,
-    end: float,
+    start: float | None = ...,
+    end: float | None = ...,
     periods: int | None = ...,
     freq: int | None = ...,
     name: Hashable = ...,
@@ -371,7 +329,7 @@ def interval_range(
 @overload
 def interval_range(
     start: _TimestampLike,
-    end: _TimestampLike = ...,
+    end: _TimestampLike | None = ...,
     periods: int | None = ...,
     freq: str | BaseOffset | pd.Timedelta | dt.timedelta | None = ...,
     name: Hashable = ...,
@@ -388,19 +346,9 @@ def interval_range(
     closed: IntervalClosedType = ...,
 ) -> IntervalIndex[Interval[pd.Timestamp]]: ...
 @overload
-def interval_range(
-    start: _TimestampLike,
-    *,
-    end: None = ...,
-    periods: int | None = ...,
-    freq: str | BaseOffset | pd.Timedelta | dt.timedelta | None = ...,
-    name: Hashable = ...,
-    closed: IntervalClosedType = ...,
-) -> IntervalIndex[Interval[pd.Timestamp]]: ...
-@overload
 def interval_range(
     start: _TimedeltaLike,
-    end: _TimedeltaLike = ...,
+    end: _TimedeltaLike | None = ...,
     periods: int | None = ...,
     freq: str | BaseOffset | pd.Timedelta | dt.timedelta | None = ...,
     name: Hashable = ...,
@@ -416,13 +364,3 @@ def interval_range(
     name: Hashable = ...,
     closed: IntervalClosedType = ...,
 ) -> IntervalIndex[Interval[pd.Timedelta]]: ...
-@overload
-def interval_range(
-    start: _TimedeltaLike,
-    *,
-    end: None = ...,
-    periods: int | None = ...,
-    freq: str | BaseOffset | pd.Timedelta | dt.timedelta | None = ...,
-    name: Hashable = ...,
-    closed: IntervalClosedType = ...,
-) -> IntervalIndex[Interval[pd.Timedelta]]: ...

pandas-stubs/io/sql.pyi

@@ -115,7 +115,7 @@ def read_sql(
         | None
     ) = ...,
     parse_dates: list[str] | dict[str, str] | dict[str, dict[str, Any]] | None = ...,
-    columns: list[str] = ...,
+    columns: list[str] | None = ...,
     *,
     chunksize: int,
     dtype: DtypeArg | None = ...,
@@ -136,7 +136,7 @@ def read_sql(
         | None
     ) = ...,
     parse_dates: list[str] | dict[str, str] | dict[str, dict[str, Any]] | None = ...,
-    columns: list[str] = ...,
+    columns: list[str] | None = ...,
     chunksize: None = ...,
     dtype: DtypeArg | None = ...,
     dtype_backend: DtypeBackend | _NoDefaultDoNotUse = ...,