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https://issues.apache.org/jira/browse/ARROW-12431?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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ASF GitHub Bot updated ARROW-12431:
-----------------------------------
Labels: pull-request-available (was: )
> [Python] pa.array mask inverted when type is binary and value to be converted
> is numpy array
> --------------------------------------------------------------------------------------------
>
> Key: ARROW-12431
> URL: https://issues.apache.org/jira/browse/ARROW-12431
> Project: Apache Arrow
> Issue Type: Bug
> Reporter: Daniel Nugent
> Assignee: Alessandro Molina
> Priority: Major
> Labels: pull-request-available
> Fix For: 5.0.0
>
> Time Spent: 10m
> Remaining Estimate: 0h
>
> {code:python}
> Python 3.9.2 | packaged by conda-forge | (default, Feb 21 2021, 05:02:46)
>
> [GCC 9.3.0] on linux
> Type "help", "copyright", "credits" or "license" for more information.
> >>> import numpy as np
> >>> import pyarrow as pa
> >>>
> >>> pa.array(np.array([b'\x00']),type=pa.binary(1), mask = np.array([False]))
> <pyarrow.lib.FixedSizeBinaryArray object at 0x7fa080ca3640>
> [
> null
> ]
> >>> pa.array(np.array([b'\x00']),type=pa.binary(1), mask = np.array([True]))
> <pyarrow.lib.FixedSizeBinaryArray object at 0x7fa080ca3700>
> [
> 00
> ]
> >>> pa.array([b'\x00'],type=pa.binary(1), mask = np.array([False]))
> <pyarrow.lib.FixedSizeBinaryArray object at 0x7fa083cc9520>
> [
> 00
> ]
> >>> pa.__version__
> '3.0.0'
> >>> np.__version__
> '1.20.1'
> {code}
> Happens both with FixedSizeBinary and variable sized binary (I was working
> with FixedSizeBinary). Does not happen for integers (presumably other types,
> didn't exhaustively check)?
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