hjtran commented on code in PR #35874:
URL: https://github.com/apache/beam/pull/35874#discussion_r2279580801
##########
sdks/python/apache_beam/typehints/typecheck_test.py:
##########
@@ -179,6 +179,15 @@ def process(self, element, *args, **kwargs):
(self.p | beam.Create(['1', '1']) | beam.ParDo(ToInt()))
self.p.run().wait_until_finish()
+ def test_bad_flatten_input(self):
+ with self.assertRaisesRegex(
+ TypeError,
+ "Inputs to Flatten cannot include an iterable of PCollections. "):
+ with beam.Pipeline() as p:
+ pc = p | beam.Create([1, 1])
+ flatten_inputs = [pc, (pc, )]
+ flatten_inputs | beam.Flatten()
Review Comment:
I don't think this is necessary
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