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https://issues.apache.org/jira/browse/ARROW-17839?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17610822#comment-17610822
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Matthias Vallentin commented on ARROW-17839:
--------------------------------------------
Thanks for the point, [~jorisvandenbossche]. Glad to see that a fix is underway.
Would you mind pointing me to instructions on how to do the test that you
performed? I am using Poetry and couldn't get the branch to compile. In theory,
I thought this should do the trick:
{code:java}
[tool.poetry.dependencies]
#pyarrow = "^9.0"
pyarrow = { git = "https://github.com/milesgranger/arrow.git";, branch =
"ARROW-15545_cast-of-extension-types", subdirectory = "python" }{code}
But this fails to compile due to missing dependencies. (I managed to workaround
OpenSSL by providing the right env var, but now I'm stuck with Flight not being
found.) I was hoping that there is some sort of dev guide that shows how to get
going.
> [Python] Cannot create RecordBatch with nested struct containing extension
> type
> -------------------------------------------------------------------------------
>
> Key: ARROW-17839
> URL: https://issues.apache.org/jira/browse/ARROW-17839
> Project: Apache Arrow
> Issue Type: Bug
> Components: Python
> Affects Versions: 9.0.0
> Environment: macOS 12.5.1 on an Apple M1 Ultra.
> Reporter: Matthias Vallentin
> Priority: Blocker
> Attachments: example.py
>
>
> I'm running into the following issue:
> {code:java}
> pyarrow.lib.ArrowNotImplementedError: Unsupported cast to
> extension<vast.address<AddressType>> from fixed_size_binary[16]{code}
> Use case: I want to create a record batch that contains this type:
> {code:java}
> pa.struct([("address", AddressType()), ("length", pa.uint8())]){code}
> Here, {{AddressType}} is an extension type that models an IP address
> ({{{}pa.binary(16){}}}).
> Please find attached a self-contained example that illustrates the issue.
>
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