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https://issues.apache.org/jira/browse/ARROW-15580?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17488102#comment-17488102
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Joris Van den Bossche commented on ARROW-15580:
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Actually, looking at the code, we indeed seem to import pytz unconditionally
and assume it to be present, if you have timestamp data with a timezone, see eg
https://github.com/apache/arrow/blob/4144c1739ec2e58d5f076fa63a0b61653324dc02/cpp/src/arrow/python/datetime.cc#L394
> package does not include pytz dependency
> ----------------------------------------
>
> Key: ARROW-15580
> URL: https://issues.apache.org/jira/browse/ARROW-15580
> Project: Apache Arrow
> Issue Type: Bug
> Components: Packaging, Python
> Affects Versions: 7.0.0
> Reporter: Mark Wood
> Priority: Minor
>
> When install pyarrow via poetry and executing same, a ModuleNotFoundError
> error can result.
> Pyarrow has a dependency on pytz, but this dependency is not declared (the
> only dependency I see declared is numpy, see
> [https://github.com/apache/arrow/blob/47d55752172af99fce629f8fe6177df6b41af1d3/python/setup.py#L576)]
> It would be helpful if pyarrow could declare its dependencies in such a way
> that tools such as poetry could automatically ensure they were present.
>
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