Wes McKinney created ARROW-971:
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Summary: [C++/Python] Implement Array.isvalid/notnull/isnull
Key: ARROW-971
URL: https://issues.apache.org/jira/browse/ARROW-971
Project: Apache Arrow
Issue Type: Improvement
Components: Python
Reporter: Wes McKinney
Fix For: 0.4.0
For arrays with nulls, this amounts to returning the validity bitmap. Without
nulls, an array of all 1 bits must be constructed. For isnull, the bits must be
flipped (in this case, the un-set part of the new bitmap must stay 0, though).
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