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https://issues.apache.org/jira/browse/ARROW-8286?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Wes McKinney resolved ARROW-8286.
---------------------------------
Resolution: Fixed
Issue resolved by pull request 6783
[https://github.com/apache/arrow/pull/6783]
> [Python] Creating dataset from pathlib results in UnionDataset instead of
> FileSystemDataset
> -------------------------------------------------------------------------------------------
>
> Key: ARROW-8286
> URL: https://issues.apache.org/jira/browse/ARROW-8286
> Project: Apache Arrow
> Issue Type: Bug
> Components: Python
> Reporter: Joris Van den Bossche
> Assignee: Joris Van den Bossche
> Priority: Major
> Labels: dataset, pull-request-available
> Fix For: 0.17.0
>
> Time Spent: 0.5h
> Remaining Estimate: 0h
>
> {code}
> import pyarrow as pa
> import pyarrow.parquet as pq
> import pyarrow.dataset as ds
> table = pa.table({'a': np.random.randn(10), 'b': range(10), 'c': ['a', 'b'] *
> 5})
> pq.write_table(table, "test.parquet")
> import pathlib
> ds.dataset(pathlib.Path("./test.parquet"))
> # gives UnionDataset
> ds.dataset(str(pathlib.Path("./test.parquet")))
> # correctly gives FileSystemDataset
> {code}
> and since those two dataset classes have different API, this is important to
> give FileSystemDataset
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