ahmedabu98 commented on issue #36026:
URL: https://github.com/apache/beam/issues/36026#issuecomment-3245769214
Hmmm looks like Beam is unable to infer the PCollection schema from
`beam.Map(lambda x: Row(**x))` and is expecting you to explicitly define the
schema.
Can you try adding the following?
```python
from apache_beam.typehints.row_type import RowTypeConstraint
...
| "ToRow" >> beam.Map(lambda x:
Row(**x)).with_output_types(RowTypeConstraint.from_fields(
[('id', str),
('name', str),
('value', int)])
...
```
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