type names too

Author: MarcoGorelli

pandas-stubs/core/indexes/multi.pyi

@@ -30,21 +30,29 @@ class MultiIndex(Index[Any]):
         levels=...,
         codes=...,
         sortorder=...,
-        names=...,
+        names: SequenceNotStr[Hashable] = ...,
         dtype=...,
         copy=...,
         name: SequenceNotStr[Hashable] = ...,
         verify_integrity: bool = ...,
         _set_identity: bool = ...,
     ) -> None: ...
     @classmethod
-    def from_arrays(cls, arrays, sortorder=..., names=...) -> Self: ...
+    def from_arrays(
+        cls, arrays, sortorder=..., names: SequenceNotStr[Hashable] = ...
+    ) -> Self: ...
     @classmethod
-    def from_tuples(cls, tuples, sortorder=..., names=...) -> Self: ...
+    def from_tuples(
+        cls, tuples, sortorder=..., names: SequenceNotStr[Hashable] = ...
+    ) -> Self: ...
     @classmethod
-    def from_product(cls, iterables, sortorder=..., names=...) -> Self: ...
+    def from_product(
+        cls, iterables, sortorder=..., names: SequenceNotStr[Hashable] = ...
+    ) -> Self: ...
     @classmethod
-    def from_frame(cls, df, sortorder=..., names=...) -> Self: ...
+    def from_frame(
+        cls, df, sortorder=..., names: SequenceNotStr[Hashable] = ...
+    ) -> Self: ...
     @property
     def shape(self): ...
     @property  # Should be read-only

tests/test_indexes.py

@@ -71,6 +71,12 @@ def test_multiindex_initialization() -> None:
         ),
         pd.MultiIndex,
     )
+    check(
+        assert_type(
+            pd.MultiIndex([[1], [4]], codes=[[0], [0]], names=["a", "b"]), pd.MultiIndex
+        ),
+        pd.MultiIndex,
+    )
 
 
 def test_index_tolist() -> None: