Robert Bradshaw created BEAM-10833:
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Summary: Error inferring type of tuple output
Key: BEAM-10833
URL: https://issues.apache.org/jira/browse/BEAM-10833
Project: Beam
Issue Type: Bug
Components: sdk-py-core
Reporter: Robert Bradshaw
```
with beam.Pipeline() as p:
class Foo(beam.DoFn):
def process(self, element):
k, v = element
yield (k, {k:v})
a = [('a',1), ('a',1), ('b',1)]
input = p | beam.Create(a)
print(input.element_type) # ok
pcoll = input | beam.ParDo(Foo())
print(pcoll.element_type) # claims Tuple[int, Dict[Any, Any]]
# BOOM on run due to coder errors
```
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