Joris Van den Bossche created ARROW-6176: --------------------------------------------
Summary: [Python] Allow to subclass ExtensionArray to attach to custom extension type Key: ARROW-6176 URL: https://issues.apache.org/jira/browse/ARROW-6176 Project: Apache Arrow Issue Type: Improvement Components: Python Reporter: Joris Van den Bossche Currently, you can define a custom extension type in Python with {code} class UuidType(pa.ExtensionType): def __init__(self): pa.ExtensionType.__init__(self, pa.binary(16)) def __reduce__(self): return UuidType, () {code} but the array you can create with this is always ExtensionArray. We should provide a way to define a subclass (eg `UuidArray` in this case) that can hold custom logic. For example, a user might want to define `UuidArray` such that `arr[i]` returns an instance of Python's `uuid.UUID` >From https://github.com/apache/arrow/pull/4532#pullrequestreview-249396691 -- This message was sent by Atlassian JIRA (v7.6.14#76016)