Revert base.py

Author: hexgnu

pandas/core/base.py

@@ -1069,18 +1069,12 @@ def memory_usage(self, deep=False):
         --------
         numpy.ndarray.nbytes
         """
-        # Use sparse values if they exist for memory consumption
-        # if hasattr(self.values, 'sp_values'):
-        #    values = self.values.sp_values
-        # else:
-        values = self.values
+        if hasattr(self.values, 'memory_usage'):
+            return self.values.memory_usage(deep=deep)
 
-        if hasattr(values, 'memory_usage'):
-            return values.memory_usage(deep=deep)
-
-        v = values.nbytes
+        v = self.values.nbytes
         if deep and is_object_dtype(self) and not PYPY:
-            v += lib.memory_usage_of_objects(values)
+            v += lib.memory_usage_of_objects(self.values)
         return v
 
     def factorize(self, sort=False, na_sentinel=-1):