REF: move IntervalIndex.equals up to ExtensionIndex.equals (pandas-dev#37561)

Author: jbrockmendel

pandas/core/indexes/extension.py

@@ -283,6 +283,17 @@ def astype(self, dtype, copy=True):
     def _isnan(self) -> np.ndarray:
         return self._data.isna()
 
+    @doc(Index.equals)
+    def equals(self, other) -> bool:
+        # Dispatch to the ExtensionArray's .equals method.
+        if self.is_(other):
+            return True
+
+        if not isinstance(other, type(self)):
+            return False
+
+        return self._data.equals(other._data)
+
 
 class NDArrayBackedExtensionIndex(ExtensionIndex):
     """

pandas/core/indexes/interval.py

@@ -970,18 +970,6 @@ def _format_space(self) -> str:
     def argsort(self, *args, **kwargs) -> np.ndarray:
         return np.lexsort((self.right, self.left))
 
-    def equals(self, other: object) -> bool:
-        """
-        Determines if two IntervalIndex objects contain the same elements.
-        """
-        if self.is_(other):
-            return True
-
-        if not isinstance(other, IntervalIndex):
-            return False
-
-        return self._data.equals(other._data)
-
     # --------------------------------------------------------------------
     # Set Operations