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https://issues.apache.org/jira/browse/ARROW-2453?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16446802#comment-16446802
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ASF GitHub Bot commented on ARROW-2453:
---------------------------------------
keechongtan opened a new pull request #1923: ARROW-2453: [Python] Improve Table
column access
URL: https://github.com/apache/arrow/pull/1923
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> [Python] Improve Table column access
> ------------------------------------
>
> Key: ARROW-2453
> URL: https://issues.apache.org/jira/browse/ARROW-2453
> Project: Apache Arrow
> Issue Type: Improvement
> Components: Python
> Affects Versions: 0.9.0
> Reporter: Antoine Pitrou
> Priority: Major
> Labels: beginner, pull-request-available
>
> Suppose you have a table column named "nulls". Right now, to access it on a
> table, you need to do something like this:
> {code:python}
> >>> table.column(table.schema.get_field_index('nulls'))
> <pyarrow.lib.Column object at 0x7fe4144d2570>
> chunk 0: <pyarrow.lib.NullArray object at 0x7fe3db51b4a8>
> [
> NA,
> NA,
> NA
> ]
> {code}
> Also, if you mistype the column name, instead of getting an error you get an
> arbitrary column:
> {code}
> >>> table.column(table.schema.get_field_index('z'))
> <pyarrow.lib.Column object at 0x7fe3dbd6cc30>
> chunk 0: <pyarrow.lib.Int64Array object at 0x7fe3db54b408>
> [
> 0,
> 1,
> 2
> ]
> {code}
> {{Table.column()}} should accept a string object and return the column with
> the corresponding name. KeyError should be raised if there is no column with
> a such name.
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