Ahmet Altay created BEAM-12340:
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Summary: 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
Assignee: Pablo Estrada
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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