Kenta Murata created ARROW-4662:
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Summary: [Python] Add type_codes property in UnionType
Key: ARROW-4662
URL: https://issues.apache.org/jira/browse/ARROW-4662
Project: Apache Arrow
Issue Type: New Feature
Components: Python
Reporter: Kenta Murata
Assignee: Kenta Murata-- This message was sent by Atlassian JIRA (v7.6.3#76005)
