BUG: Update error message for NA-like level validation to include level and index name

whyvineet · whyvineet · commit 3e6386542621 · 2025-08-25T11:42:59.000+05:30
diff --git a/pandas/core/indexes/base.py b/pandas/core/indexes/base.py
@@ -2088,7 +2088,7 @@ def _validate_index_level(self, level) -> None:
         # Also reject all NA-like values (np.nan, pd.NA, pd.NaT, etc.)
         if isna(level):
             raise KeyError(
-                "Requested level is NA/NaN/NaT, which is not a valid level name"
+                f"Requested level ({level}) does not match index name ({self.name})"
             )
 
         # Reject booleans unless the index name is actually a boolean and matches

Original file line number	Diff line number	Diff line change
`@@ -2088,7 +2088,7 @@ def _validate_index_level(self, level) -> None:`
`2088`	`2088`	`# Also reject all NA-like values (np.nan, pd.NA, pd.NaT, etc.)`
`2089`	`2089`	`if isna(level):`
`2090`	`2090`	`raise KeyError(`
`2091`		`- "Requested level is NA/NaN/NaT, which is not a valid level name"`
	`2091`	`+ f"Requested level ({level}) does not match index name ({self.name})"`
`2092`	`2092`	`)`
`2093`	`2093`
`2094`	`2094`	`# Reject booleans unless the index name is actually a boolean and matches`