[jira] [Created] (FLINK-18883) Support reduce() operation for Python KeyedStream.

[Shang Yuanchun (Jira)]

Hequn Cheng created FLINK-18883:
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             Summary: Support reduce() operation for Python KeyedStream.
                 Key: FLINK-18883
                 URL: https://issues.apache.org/jira/browse/FLINK-18883
             Project: Flink
          Issue Type: Sub-task
          Components: API / Python
            Reporter: Hequn Cheng
            Assignee: Hequn Cheng
             Fix For: 1.12.0






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