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https://issues.apache.org/jira/browse/BEAM-12340?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17410015#comment-17410015
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Beam JIRA Bot commented on BEAM-12340:
--------------------------------------
This issue was marked "stale-P2" and has not received a public comment in 14
days. It is now automatically moved to P3. If you are still affected by it, you
can comment and move it back to P2.
> Document: _namespace is a reserved field for DoFns (used for display data)
> --------------------------------------------------------------------------
>
> Key: BEAM-12340
> URL: https://issues.apache.org/jira/browse/BEAM-12340
> Project: Beam
> Issue Type: Bug
> Components: sdk-py-core, website
> Reporter: Ahmet Altay
> Priority: P3
>
> User reported issue when _namespace is not used for display data:
> > self._populate_items(display_data_dict)
> > File third_party/py/apache_beam/transforms/display.py", line 117, in
> > _populate_items
> > element._namespace(), element.display_data())
> > TypeError: 'str' object is not callable
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