[Python] Construct pyarrow.DictionaryArray from boxed pyarrow array objects

[asfimport]

Currently DictionaryArray.from_arrays expect pandas-originated NumPy objects

Reporter: Wes McKinney / @wesm
Assignee: Wes McKinney / @wesm

Related issues:

• Arrow 0.3 release (blocks)

_{Note: This issue was originally created as ARROW-752. Please see the migration documentation for further details.}

[asfimport]

Wes McKinney / @wesm:
PR: #496

[asfimport]

Wes McKinney / @wesm:
Issue resolved by pull request 496
#496