saavannanavati commented on a change in pull request #12352:
URL: https://github.com/apache/beam/pull/12352#discussion_r471174427
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File path: sdks/python/apache_beam/transforms/core.py
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@@ -1465,6 +1465,11 @@ def get_restriction_coder(self):
from apache_beam.runners.common import DoFnSignature
return DoFnSignature(self.fn).get_restriction_coder()
+ def _add_type_constraint_from_consumer(self, full_label, input_type_hints):
Review comment:
Yes, we store this information during `get_input_type_hints` which
produces the data that's passed to `_add_type_constraint_from_consumer`.
I added a test called
`test_downstream_input_type_hint_error_has_descriptive_error_msg` to confirm
this behavior, but let me know if that doesn't cover the case you're talking
about.
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