Fix import issue in series.pyi to resolve Ruff error

Author: janlodewijk

pandas-stubs/core/series.pyi

@@ -30,11 +30,11 @@ from matplotlib.axes import (
 )
 import numpy as np
 from pandas import (
+    Index,
     Period,
     PeriodDtype,
     Timedelta,
     Timestamp,
-    Index,
 )
 from pandas.core.api import (
     Int8Dtype as Int8Dtype,
@@ -59,7 +59,6 @@ from pandas.core.indexes.accessors import (
     TimedeltaProperties,
     TimestampProperties,
 )
-from pandas.core.indexes.base import Index
 from pandas.core.indexes.category import CategoricalIndex
 from pandas.core.indexes.datetimes import DatetimeIndex
 from pandas.core.indexes.interval import IntervalIndex

test

@@ -0,0 +1,2 @@
+    test
+ind  abc

tests/test_series.py

@@ -3541,6 +3541,12 @@ def test_series_dict() -> None:
     )
 
 
+def test_series_keys_type() -> None:
+    # GH 1101
+    s = pd.Series([1, 2, 3])
+    check(assert_type(s.keys(), pd.Index), pd.Index)
+
+
 def test_series_int_float() -> None:
     # pyright infers mixtures of int and float in a list as list[int | float]
     check(assert_type(pd.Series([1, 2, 3]), "pd.Series[int]"), pd.Series, np.integer)