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Declare the chart output contract once for the Python visualization operators #9203
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Task Summary
The 48 Python visualization descriptors under common/workflow-operator/.../operator/visualization/ each declare the same output contract by hand:
- a
getOutputSchemasoverride that returns onehtml-contentSTRING column on the single output port; producesDataFrame = false, so the exported script does not print the chart as a leaf DataFrame.
Move both into one trait that the 48 descriptors extend. Behavior stays the same: the same schemas, the same generated Python, and the same operator metadata. VisualizationOutputSchemaSpec already checks the schema of every registered chart and stays as the guard.
Task Type
- Refactor / Cleanup
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aglinxinyuan commentedon Oct 28, 2026
/take
github-actions commentedon Oct 28, 2026
👋 Thanks for opening this issue, @aglinxinyuan!
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refactor(workflow-operator): share the chart output contract (apache#…