support dict keys in constructor to Series

Author: Dr-Irv

pandas-stubs/core/series.pyi

@@ -1,3 +1,4 @@
+from collections import dict_keys  # type: ignore[attr-defined]
 from collections.abc import (
     Callable,
     Hashable,
@@ -354,7 +355,7 @@ class Series(IndexOpsMixin[S1], NDFrame):
     @overload
     def __new__(
         cls,
-        data: S1 | _ListLike[S1] | dict[HashableT1, S1],
+        data: S1 | _ListLike[S1] | dict[HashableT1, S1] | dict_keys[S1, Any],
         index: Axes | None = ...,
         *,
         dtype: Dtype = ...,

tests/test_series.py

@@ -3529,3 +3529,12 @@ def test_path_div() -> None:
 
     folders = pd.Series([folder, folder])
     check(assert_type(folders / Path("a.png"), pd.Series), pd.Series, Path)
+
+
+def test_series_dict() -> None:
+    # GH 812
+    check(
+        assert_type(pd.Series({"a": 1, "b": 2}.keys()), "pd.Series[str]"),
+        pd.Series,
+        str,
+    )