REF: Consistently use _reset_cache for cache clearing (#59617)

Standardize cache clearing

Author: mroeschke

pandas/core/indexes/multi.py

@@ -1302,7 +1302,7 @@ def _view(self) -> MultiIndex:
             verify_integrity=False,
         )
         result._cache = self._cache.copy()
-        result._cache.pop("levels", None)  # GH32669
+        result._reset_cache("levels")  # GH32669
         return result
 
     # --------------------------------------------------------------------
@@ -1384,7 +1384,7 @@ def copy(  # type: ignore[override]
             verify_integrity=False,
         )
         new_index._cache = self._cache.copy()
-        new_index._cache.pop("levels", None)  # GH32669
+        new_index._reset_cache("levels")  # GH32669
         if keep_id:
             new_index._id = self._id
         return new_index

pandas/core/internals/managers.py

@@ -2154,7 +2154,7 @@ def setitem_inplace(self, indexer, value) -> None:
         """
         if not self._has_no_reference(0):
             self.blocks = (self._block.copy(),)
-            self._cache.clear()
+            self._reset_cache()
 
         arr = self.array
 
@@ -2179,7 +2179,7 @@ def idelete(self, indexer) -> SingleBlockManager:
         nb = self._block.delete(indexer)[0]
         self.blocks = (nb,)
         self.axes[0] = self.axes[0].delete(indexer)
-        self._cache.clear()
+        self._reset_cache()
         return self
 
     def fast_xs(self, loc):