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Implement _CommaSeparatedListAction to handle comma-separated values for experiments and dataflow_service_options, matching Java SDK behavior. This allows more flexible input formats while maintaining backward compatibility.

Fixes #35563


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…e options

Implement _CommaSeparatedListAction to handle comma-separated values for experiments and dataflow_service_options, matching Java SDK behavior. This allows more flexible input formats while maintaining backward compatibility.
@liferoad liferoad requested a review from Abacn July 13, 2025 18:15
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Assigning reviewers:

R: @shunping for label python.

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@liferoad liferoad requested a review from Abacn July 14, 2025 23:35
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Thank you!

@liferoad liferoad merged commit def8664 into apache:master Jul 15, 2025
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talatuyarer pushed a commit to talatuyarer/beam that referenced this pull request Jul 15, 2025
* feat(options): add support for comma-separated experiments and service options

Implement _CommaSeparatedListAction to handle comma-separated values for experiments and dataflow_service_options, matching Java SDK behavior. This allows more flexible input formats while maintaining backward compatibility.

* fix lint

* lint

* yapf

* updated the test

* updated changes.md

* polished docstrings
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[Bug]: Python experiments and dataflow_service_options do not handle comma separated options

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