Commits

Wes McKinney authored e29e26737ff
ARROW-6435: [Python] Use pandas null coding consistently on List and Struct types also fixes ARROW-6434 Closes #5302 from wesm/ARROW-6435 and squashes the following commits: 6b88de09e <Wes McKinney> Rebase and remove duplicated code ee8574d00 <Wes McKinney> Use Hadoop 2.9.2 since 2.6.5 is no longer available from ASF mirrors c5a50a458 <Wes McKinney> Raise more helpful exception when trying to convert array of NaN to list or struct type and from_pandas=False 2b2ac65ff <Wes McKinney> Do not attempt to recode DictionaryArray in Table.to_pandas if already dictionary type 9ae4c47bc <Wes McKinney> Use pandas null coding consistently on List and Struct types also Authored-by: Wes McKinney <wesm+git@apache.org> Signed-off-by: Wes McKinney <wesm+git@apache.org>