correct name annotation for MultiIndex

Author: MarcoGorelli

pandas-stubs/core/indexes/multi.pyi

@@ -9,6 +9,7 @@ from typing import (
     overload,
 )
 
+from _typing import SequenceNotStr
 import numpy as np
 import pandas as pd
 from pandas.core.indexes.base import Index
@@ -24,18 +25,6 @@ from pandas._typing import (
 )
 
 class MultiIndex(Index[Any]):
-    def __new__(
-        cls,
-        levels=...,
-        codes=...,
-        sortorder=...,
-        names=...,
-        dtype=...,
-        copy=...,
-        name: Hashable = ...,
-        verify_integrity: bool = ...,
-        _set_identity: bool = ...,
-    ) -> Self: ...
     def __init__(
         self,
         levels=...,
@@ -44,7 +33,7 @@ class MultiIndex(Index[Any]):
         names=...,
         dtype=...,
         copy=...,
-        name: Hashable = ...,
+        name: SequenceNotStr[Hashable] = ...,
         verify_integrity: bool = ...,
         _set_identity: bool = ...,
     ) -> None: ...

tests/test_indexes.py

@@ -64,6 +64,15 @@ def test_multiindex_get_level_values() -> None:
     check(assert_type(i1, pd.Index), pd.Index)
 
 
+def test_multiindex_initialization() -> None:
+    check(
+        assert_type(
+            pd.MultiIndex([[1], [4]], codes=[[0], [0]], name=["a", "b"]), pd.MultiIndex
+        ),
+        pd.MultiIndex,
+    )
+
+
 def test_index_tolist() -> None:
     i1 = pd.Index([1, 2, 3])
     check(assert_type(i1.tolist(), list[int]), list, int)