chadrik commented on a change in pull request #12881:
URL: https://github.com/apache/beam/pull/12881#discussion_r491598497
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File path: sdks/python/apache_beam/runners/worker/bundle_processor.py
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@@ -947,11 +955,11 @@ def process_bundle(self, instruction_id):
# (transform_id, timer_family_id).
data_channels = collections.defaultdict(
list
- ) # type: DefaultDict[data_plane.GrpcClientDataChannel, List[str]]
+ ) # type: DefaultDict[data_plane.GrpcClientDataChannel, List[Union[str,
Tuple[str, str]]]]
Review comment:
This can in fact contain items which are `Tuple[str, str]`. see:
```python
data_channels[self.timer_data_channel].extend(
list(self.timers_info.keys()))
```
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