jrmccluskey commented on code in PR #34897:
URL: https://github.com/apache/beam/pull/34897#discussion_r2082135603
##########
sdks/python/apache_beam/ml/anomaly/transforms.py:
##########
@@ -37,13 +38,16 @@
from apache_beam.ml.anomaly.specifiable import Specifiable
from apache_beam.ml.inference.base import RunInference
from apache_beam.transforms.userstate import ReadModifyWriteStateSpec
+from apache_beam.typehints.typehints import TupleConstraint
KeyT = TypeVar('KeyT')
-TempKeyT = TypeVar('TempKeyT', bound=int)
-InputT = tuple[KeyT, beam.Row]
-KeyedInputT = tuple[KeyT, tuple[TempKeyT, beam.Row]]
-KeyedOutputT = tuple[KeyT, tuple[TempKeyT, AnomalyResult]]
-OutputT = tuple[KeyT, AnomalyResult]
+TempKeyT = TypeVar('TempKeyT', bound=str)
+InputT = beam.Row
+OutputT = AnomalyResult
Review Comment:
Nit: these type aliases aren't strictly necessary given that they're
specific single types, but since you use them to compose the tuple types
they're fine to keep
##########
sdks/python/apache_beam/ml/anomaly/transforms.py:
##########
@@ -600,20 +610,43 @@ def expand(
#
# We select uuid.uuid1() for its inclusion of node information, making it
# more suitable for parallel execution environments.
- add_temp_key_fn: Callable[[InputT], KeyedInputT] \
- = lambda e: (e[0], (str(uuid.uuid1()), e[1]))
- keyed_input = (input | "Add temp key" >> beam.Map(add_temp_key_fn))
+ if isinstance(input.element_type, TupleConstraint):
+ keyed_input = input
+ else:
+ # Add a None key if the input is unkeyed.
+ keyed_input = input | beam.WithKeys(None)
Review Comment:
Nit: I'd shy away from a `None` key and use a real-valued constant. Once
again not wholly necessary, just a thought
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