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https://issues.apache.org/jira/browse/ARROW-15580?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17488096#comment-17488096
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Joris Van den Bossche commented on ARROW-15580:
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Can you show the error you get? (and with which code snippet you get it)
I would assume that pytz is only an optional dependency (i.e. only used when
installed), which doesn't require it being added to setup.py install_requires.
And if we accidentally depend on it unconditionally, that sounds as a bug.
> 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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