[jira] [Comment Edited] (ARROW-9394) [Python] Support pickling of Scalars

["Joris Van den Bossche (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/ARROW-9394?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17154919#comment-17154919 ] 

Joris Van den Bossche edited comment on ARROW-9394 at 7/9/20, 8:45 PM:
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> Could this be as implemented with Scalar, (self.type, self.as_py())?

Not all types support this type of roundtrip. At least dictionary type comes to mind: ARROW-9369 (not sure if there are others, though)

But if it is the only one, it also shouldn't be hard to have a custom reduce for only the DictionaryScalar I think


was (Author: jorisvandenbossche):
> Could this be as implemented with Scalar, (self.type, self.as_py())?

Not all types support this type of roundtrip. At least dictionary type comes to mind: ARROW-9369 (not sure if there are others, though)

> [Python] Support pickling of Scalars
> ------------------------------------
>
>                 Key: ARROW-9394
>                 URL: https://issues.apache.org/jira/browse/ARROW-9394
>             Project: Apache Arrow
>          Issue Type: Improvement
>          Components: Python
>            Reporter: Ben Kietzman
>            Assignee: Krisztian Szucs
>            Priority: Major
>             Fix For: 2.0.0
>
>
> Scalars don't currently support pickling.
> Could this be as implemented with {{Scalar, (self.type, self.as_py())}}?



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