chadrik commented on a change in pull request #12881:
URL: https://github.com/apache/beam/pull/12881#discussion_r491593456
##########
File path: sdks/python/apache_beam/runners/worker/bundle_processor.py
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@@ -1344,7 +1356,8 @@ def create_deprecated_read(
consumers # type: Dict[str, List[operations.Operation]]
):
# type: (...) -> operations.ReadOperation
- source = iobase.SourceBase.from_runner_api(parameter.source, factory.context)
+ source = iobase.BoundedSource.from_runner_api(
Review comment:
This shouldn't change the behavior of the code, it merely indicates to
the type system that we expect `BoundedSource`, since `SourceBase` is not
sufficient here (we need `default_output_coder()`)
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