[jira] [Created] (ARROW-12492) [Python] Add an helper method to decode a DictionaryArray back to a plain Array

["Alessandro Molina (Jira)" <ji...@apache.org>]

Alessandro Molina created ARROW-12492:
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             Summary: [Python] Add an helper method to decode a DictionaryArray back to a plain Array
                 Key: ARROW-12492
                 URL: https://issues.apache.org/jira/browse/ARROW-12492
             Project: Apache Arrow
          Issue Type: New Feature
          Components: Python
            Reporter: Alessandro Molina


To create a DictionaryArray pyarrow currently offers the {{Array.dictionary_encode}} helper, but there is a lack of an obvious way to do the reverse. A {{DictionaryArray.decode}} helper could provide an immediate obvious solution to get back an unrolled Array from the dictionary encoded version.



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