[GitHub] [arrow] AlenkaF commented on a diff in pull request #35933: GH-35599: [Python] Canonical fixed-shape tensor extension array/type is not picklable.

["AlenkaF (via GitHub)" <gi...@apache.org>]

AlenkaF commented on code in PR #35933:
URL: https://github.com/apache/arrow/pull/35933#discussion_r1226671566


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python/pyarrow/types.pxi:
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@@ -1586,6 +1586,10 @@ cdef class FixedShapeTensorType(BaseExtensionType):
     def __arrow_ext_class__(self):
         return FixedShapeTensorArray
 
+    def __reduce__(self):

Review Comment:
   As the logic for the `__arrow_ext_deserialize__` of the `FixedShapeTensorType` is happening in C++ we can not use `__arrow_ext_deserialize__` and `__arrow_ext_serialize__` to define `__reduce__` here.
   
   But we can do that for `ExtensionType class`. I have created a separate issue for it: https://github.com/apache/arrow/issues/36038



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