fixes

Author: topper-123

pandas/core/dtypes/common.py

@@ -1749,9 +1749,9 @@ def validate_all_hashable(*args) -> None:
     >>> validate_all_hashable(1)
 
     >>> validate_all_hashable([1])
-    ValueError: All elements must be hashable
+    TypeError: All elements must be hashable
     """
-    if not all(is_hashable(x) for x in args):
+    if not all(is_hashable(arg) for arg in args):
         raise TypeError("All elements must be hashable")
 
 

pandas/tests/indexes/multi/test_names.py

@@ -79,7 +79,7 @@ def test_copy_names():
     with pytest.raises(ValueError, match="Length of new names must be 2, got 1"):
         multi_idx.copy(names=["mario"])
 
-    with pytest.raises(TypeError, match="MultiIndex.name must be a hashable type"):
+    with pytest.raises(TypeError, match="All elements must be hashable"):
         multi_idx.copy(names=[["mario"], ["luigi"]])