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https://issues.apache.org/jira/browse/ARROW-4311?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16748017#comment-16748017
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Wes McKinney commented on ARROW-4311:
-------------------------------------
This was an undocumented "feature" that didn't have any unit tests. PR would be
welcome; hopefully someone can fix for 0.13
> [Python] Regression on pq.ParquetWriter incorrectly handling source string
> --------------------------------------------------------------------------
>
> Key: ARROW-4311
> URL: https://issues.apache.org/jira/browse/ARROW-4311
> Project: Apache Arrow
> Issue Type: Bug
> Components: Python
> Affects Versions: 0.12.0
> Reporter: Francisco Sanchez
> Priority: Major
> Fix For: 0.13.0
>
>
> In the latest changes to filesystem.py some new functions have been added to
> check the source string when calling pq.ParquetWriter. With the current
> implementation some assumptions are done about the format of the string which
> means that if the string is provided following some of these patterns it will
> be automatically split/formatted and changed to something else.
> To give you a specific example, if I provide a string like
> {{directory/level1#level2.parquet}} it will be written to disk as
> {{directory/level1}}. The behaviour has changed on 0.12.0 from 0.11.1 and
> nothing is stated in the documentation.
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