robertwb commented on a change in pull request #11185: [BEAM-8019] Updates
Python SDK to handle remote SDK coders and preserve tags added by remote SDKs
and propagate restriction coders.
URL: https://github.com/apache/beam/pull/11185#discussion_r402676418
##########
File path: sdks/python/apache_beam/pipeline.py
##########
@@ -1133,29 +1141,67 @@ def from_runner_api(proto, # type:
beam_runner_api_pb2.PTransform
context # type: PipelineContext
):
# type: (...) -> AppliedPTransform
- def is_side_input(tag):
- # type: (str) -> bool
- # As per named_inputs() above.
- return tag.startswith('side')
+
+ if common_urns.primitives.PAR_DO.urn == proto.spec.urn:
+ # Preserving side input tags.
+ from apache_beam.portability.api import beam_runner_api_pb2
+ payload = (
+ proto_utils.parse_Bytes(
+ proto.spec.payload, beam_runner_api_pb2.ParDoPayload))
+ side_input_tags = list(payload.side_inputs.keys())
+ else:
+ side_input_tags = []
main_inputs = [
context.pcollections.get_by_id(id) for tag,
- id in proto.inputs.items() if not is_side_input(tag)
+ id in proto.inputs.items() if tag not in side_input_tags
]
- # Ordering is important here.
- indexed_side_inputs = [
- (get_sideinput_index(tag), context.pcollections.get_by_id(id)) for tag,
- id in proto.inputs.items() if is_side_input(tag)
- ]
- side_inputs = [si for _, si in sorted(indexed_side_inputs)]
+ def is_python_side_input(tag):
+ # type: (str) -> bool
+ # As per named_inputs() above.
+ return re.match(SIDE_INPUT_REGEX, tag)
+
+ uses_python_sideinput_tags = (
+ is_python_side_input(side_input_tags[0]) if side_input_tags else False)
+
+ if uses_python_sideinput_tags:
+ # Ordering is important here.
+ # TODO(BEAM-9635): use key, value pairs instead of depending on tags with
+ # index as a suffix.
+ indexed_side_inputs = [
+ (get_sideinput_index(tag), context.pcollections.get_by_id(id))
+ for tag,
+ id in proto.inputs.items() if tag in side_input_tags
+ ]
+ side_inputs = [si for _, si in sorted(indexed_side_inputs)]
+ else:
+ side_inputs = [
+ context.pcollections.get_by_id(id) for tag,
+ id in proto.inputs.items() if tag in side_input_tags
+ ]
+
transform = ptransform.PTransform.from_runner_api(proto, context)
+ if isinstance(transform, RunnerAPIPTransformHolder):
+ # For external transforms that are ParDos, we have to set side-inputs
+ # manually and preserve input tags.
+ transform.side_inputs = [pvalue.AsMultiMap(pc) for pc in side_inputs]
+ input_tags_to_preserve = {
+ context.pcollections.get_by_id(id): tag
+ for tag,
+ id in proto.inputs.items()
+ }
+ else:
Review comment:
Where does transform.side_inputs in this path?
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