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https://issues.apache.org/jira/browse/BEAM-577?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15432927#comment-15432927
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Kenneth Knowles commented on BEAM-577:
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When this is resolved, let's update the answer at
http://stackoverflow.com/questions/39085869/opening-a-gzip-file-in-python-apache-beam
> Update filebasedsource to support compressed files
> --------------------------------------------------
>
> Key: BEAM-577
> URL: https://issues.apache.org/jira/browse/BEAM-577
> Project: Beam
> Issue Type: Improvement
> Components: sdk-py
> Reporter: Chamikara Jayalath
> Assignee: Chamikara Jayalath
>
> FileBasedSource framework [1] should be updated to properly read compressed
> files.
> One possible way to do this might be to update FileBasedSource.open_file()
> [2] to return a CompressedFile [3].
> Similar to Java implementation, we may not be able to support dynamic work
> rebalancing for compressed files.
> [1]
> https://github.com/apache/incubator-beam/blob/python-sdk/sdks/python/apache_beam/io/filebasedsource.py
> [2]
> https://github.com/apache/incubator-beam/blob/python-sdk/sdks/python/apache_beam/io/filebasedsource.py#L125
> [3]
> https://github.com/apache/incubator-beam/blob/python-sdk/sdks/python/apache_beam/io/fileio.py#L300
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