robertwb commented on a change in pull request #11838:
URL: https://github.com/apache/beam/pull/11838#discussion_r431465968
##########
File path:
sdks/python/apache_beam/runners/interactive/caching/streaming_cache.py
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@@ -304,6 +304,18 @@ def read(self, *labels):
return iter([]), -1
return StreamingCache.Reader([header], [reader]).read(), 1
+ @staticmethod
+ def sentinel_label():
Review comment:
Rather than introduce a sentinel label, how about returning a dict from
expand iff output_tags was manually specified (or, alternatively, something
other than `{None}`)?
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