[GitHub] [arrow] westonpace commented on a change in pull request #11993: ARROW-15153: [Python] Expose ReferencedBufferSize to python [WIP]

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westonpace commented on a change in pull request #11993:
URL: https://github.com/apache/arrow/pull/11993#discussion_r772568484



##########
File path: python/pyarrow/array.pxi
##########
@@ -994,6 +994,27 @@ cdef class Array(_PandasConvertible):
                 size += buf.size
         return size
 
+    def get_refererenced_buffer_size(self):
+        cdef:
+            shared_ptr[CArray] shd_ptr_c_array
+            CArray *c_array
+            CResult[int64_t] c_res_buffer
+        
+        shd_ptr_c_array = pyarrow_unwrap_array(self)
+        c_array = shd_ptr_c_array.get()
+        c_res_buffer = ReferencedBufferSize(c_array[0])
+        size = GetResultValue(c_res_buffer)
+        return size
+
+    @property
+    def get_buffer_size(self):

Review comment:
       I believe the goal was for `nbytes` to use `get_referenced_buffer_size` and for the old `nbytes` behavior to become a new method.
   
   Note: this was not what was said in the JIRA, but based on comments, I think it is what we wanted.  I have updated the description in the JIRA to be more clear on this.




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