[jira] [Commented] (BEAM-577) Update filebasedsource to support compressed files

["Kenneth Knowles (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/BEAM-577?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15432927#comment-15432927 ] 

Kenneth Knowles commented on BEAM-577:
--------------------------------------

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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