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https://issues.apache.org/jira/browse/ARROW-8213?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Francois Saint-Jacques updated ARROW-8213:
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Component/s: C++ - Dataset
> [Python][Dataset] Opening a dataset with a local incorrect path gives
> confusing error message
> ---------------------------------------------------------------------------------------------
>
> Key: ARROW-8213
> URL: https://issues.apache.org/jira/browse/ARROW-8213
> Project: Apache Arrow
> Issue Type: Bug
> Components: C++ - Dataset, Python
> Reporter: Joris Van den Bossche
> Priority: Major
> Fix For: 0.17.0
>
>
> Even after the previous PRs related to local paths
> (https://github.com/apache/arrow/pull/6643,
> https://github.com/apache/arrow/pull/6655), I don't the user experience
> optimal in case you are working with local files, and pass a wrong,
> non-existent path (eg due to a typo).
> Currently, you get this error:
> {code}
> >>> dataset = ds.dataset("data_with_typo.parquet", format="parquet")
> ...
> ArrowInvalid: URI has empty scheme: 'data_with_typo.parquet'
> {code}
> where "URI has empty scheme" is rather confusing for the user in case of a
> non-existent path. I think ideally we should raise a "No such file or
> directory" error.
> I am not fully sure what the best solution is, as {{FileSystem.from_uri}} can
> also give other errors that we do want to propagate to the user.
> The most straightforward that I am now thinking of is checking if "URI has
> empty scheme" is in the error message, and then rewording it, but that's not
> very clean ..
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