[jira] [Commented] (ARROW-1886) [Python] Add function to "flatten" structs within tables

["ASF GitHub Bot (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/ARROW-1886?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16441028#comment-16441028 ] 

ASF GitHub Bot commented on ARROW-1886:
---------------------------------------

pitrou commented on issue #1768: ARROW-1886: [C++/Python] Flatten struct columns in table 
URL: https://github.com/apache/arrow/pull/1768#issuecomment-382036560
 
 
   I've rebased this PR. @cpcloud could you answer on the comments when you have time?

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> [Python] Add function to "flatten" structs within tables
> --------------------------------------------------------
>
>                 Key: ARROW-1886
>                 URL: https://issues.apache.org/jira/browse/ARROW-1886
>             Project: Apache Arrow
>          Issue Type: Improvement
>          Components: Python
>            Reporter: Wes McKinney
>            Assignee: Antoine Pitrou
>            Priority: Major
>              Labels: pull-request-available
>             Fix For: 0.10.0
>
>
> See discussion in https://issues.apache.org/jira/browse/ARROW-1873
> When a user has a struct column, it may be more efficient to flatten the struct into multiple columns of the form {{struct_name.field_name}} for each field in the struct. Then when you call {{to_pandas}}, Python dictionaries do not have to be created, and the conversion will be much more efficient



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