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https://issues.apache.org/jira/browse/ARROW-1555?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16215275#comment-16215275
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Benjamin Goldberg commented on ARROW-1555:
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I created a PR to resolve this issue:
https://github.com/apache/arrow/pull/1240
> [Python] write_to_dataset on s3
> -------------------------------
>
> Key: ARROW-1555
> URL: https://issues.apache.org/jira/browse/ARROW-1555
> Project: Apache Arrow
> Issue Type: Bug
> Affects Versions: 0.7.0
> Reporter: Young-Jun Ko
> Assignee: Florian Jetter
> Priority: Trivial
> Fix For: 0.8.0
>
>
> When writing a arrow table to s3, I get an NotImplemented Exception.
> The root cause is in _ensure_filesystem and can be reproduced as follows:
> import pyarrow
> import pyarrow.parquet as pqa
> import s3fs
> s3 = s3fs.S3FileSystem()
> pqa._ensure_filesystem(s3).exists("anything")
> It appears that the S3FSWrapper that is instantiated in _ensure_filesystem
> does not expose the exist method of s3.
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