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https://issues.apache.org/jira/browse/ARROW-1753?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16226670#comment-16226670
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ASF GitHub Bot commented on ARROW-1753:
---------------------------------------
dhirschfeld commented on issue #1272: ARROW-1753 [Python] Provide for matching
subclasses with register_type in serialization context
URL: https://github.com/apache/arrow/pull/1272#issuecomment-340740645
Hmmm, not sure what's going on there:
```
____________________________ test_match_subclasses
____________________________
def test_match_subclasses():
# should be able to serialize/deserialize an instance
# if a base class has been registered
serialization_context = pa.SerializationContext()
serialization_context.register_type(Foo, "Foo")
serialization_context.register_type(Bar, "Bar")
serialization_context.register_type(Baz, "Baz")
serialization_context.register_type(Qux, "Quz")
subqux = SubQux()
# should fallbact to Qux serializer
> serialized_object = pa.serialize(subqux, serialization_context)
pyarrow\tests\test_serialization.py:432:
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
_ _
serialization.pxi:235: in pyarrow.lib.serialize
???
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
_ _
> ???
E pyarrow.lib.SerializationCallbackError: pyarrow does not know how to
serialize objects of type <class 'int'>.
error.pxi:98: SerializationCallbackError
```
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> [Python] Provide for matching subclasses with register_type in serialization
> context
> ------------------------------------------------------------------------------------
>
> Key: ARROW-1753
> URL: https://issues.apache.org/jira/browse/ARROW-1753
> Project: Apache Arrow
> Issue Type: Improvement
> Components: Python
> Reporter: Wes McKinney
> Labels: pull-request-available
> Fix For: 0.8.0
>
>
> Copied from https://github.com/apache/arrow/issues/1269
> To allow factoring out serialization code to a common base class it would be
> useful if register_type matches all subclasses rather than simply an exact
> match on the specific type.
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