chadrik commented on a change in pull request #11038:
URL: https://github.com/apache/beam/pull/11038#discussion_r419627186
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File path: sdks/python/apache_beam/transforms/core.py
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@@ -1300,12 +1300,13 @@ def to_runner_api_parameter(self, context):
common_urns.requirements.REQUIRES_STATEFUL_PROCESSING.urn)
from apache_beam.runners.common import DoFnSignature
sig = DoFnSignature(self.fn)
- is_splittable = sig.is_splittable_dofn()
Review comment:
> It is an error to say is_splittable_dofn is True without returning a
restriction coder as well and vice versa.
This seems to validate my earlier assessment that a None result from this
`get_restriction_coder` means "is not splittable", and therefore that my
proposed change is valid.
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