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https://issues.apache.org/jira/browse/BEAM-778?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15943269#comment-15943269
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Tibor Kiss commented on BEAM-778:
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[~katsia...@google.com]: Thanks for the explanation! BZ2 has certainly mislead
me: fileobj support is only available in Python 3.x.
It is not possible to implement fileobj support by extending the class under
Python 2.7 as BZ2 is written as a C module and uses FILE* inside.
Therefore I'll stick with the original design and implement seek() on top of
that.
> Make fileio._CompressedFile seekable.
> -------------------------------------
>
> Key: BEAM-778
> URL: https://issues.apache.org/jira/browse/BEAM-778
> Project: Beam
> Issue Type: Improvement
> Components: sdk-py
> Reporter: Chamikara Jayalath
> Assignee: Tibor Kiss
> Fix For: Not applicable
>
>
> We have a TODO to make fileio._CompressedFile seekable.
> https://github.com/apache/incubator-beam/blob/python-sdk/sdks/python/apache_beam/io/fileio.py#L692
> Without this, compressed file objects produce for FileBasedSource
> implementations may not be able to use libraries that utilize methods seek()
> and tell().
> For example tarfile.open().
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