saavannanavati commented on a change in pull request #12352:
URL: https://github.com/apache/beam/pull/12352#discussion_r466747648
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File path: sdks/python/apache_beam/runners/worker/opcounters.py
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@@ -224,8 +230,25 @@ def _observable_callback_inner(value, is_encoded=False):
return _observable_callback_inner
+ def type_check(self, value):
+ # type: (any, bool) -> None
+ for transform_label, type_constraint_tuple in
self.output_type_constraints.items():
+ parameter_name, constraint = type_constraint_tuple
+ if constraint is not None:
Review comment:
TODO: During graph construction, don't add any `None` constraints. This
will allow us to remove this check
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