Jeffrey created BEAM-9184:
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Summary: Add ToSet() combiner, similar to ToList() and ToDict()
Key: BEAM-9184
URL: https://issues.apache.org/jira/browse/BEAM-9184
Project: Beam
Issue Type: New Feature
Components: sdk-py-core
Reporter: Jeffrey
ToList() doesn't do deduplication, and ToDict() requires key/value tuples. Sets
are a different type than dicts in Python, so ToSet() is required to combine
very large PCollections while deduplicating.
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