damccorm opened a new issue, #20513: URL: https://github.com/apache/beam/issues/20513
Similar to the tweaks for supporting native type hints on the `PTransform.expand()` method (https://issues.apache.org/jira/browse/BEAM-10258), it would be beneficial if the `CombineFn` class also received similar treatment, offering a way to provide type hints through the native Python hinting interface. Adding hints to the CombineFn's `add_input()` and `extract_output()` methods should be sufficient for providing the equivalent behavior of annotating the class with beam typehint decorators, e.g., ``` @beam.typehints.with_input_types(int) @beam.typehints.with_output_types(bool) class MyCombineFn(CombineFn): ... ``` vs ``` class MyCombineFn(CombineFn): def add_input(self, accumulator: float, element: int): ... def extract_output(self, accumulator: float) -> bool ... ``` Imported from Jira [BEAM-10418](https://issues.apache.org/jira/browse/BEAM-10418). Original Jira may contain additional context. Reported by: metzen. -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected]
