yu peng created ARROW-4350:
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Summary: [python] pyarrow table convert to pandas dataframe add
extra information
Key: ARROW-4350
URL: https://issues.apache.org/jira/browse/ARROW-4350
Project: Apache Arrow
Issue Type: Bug
Reporter: yu peng
{code:java}
In [19]: df = pd.DataFrame({'a': [[[1], [2]], [[2], [3]]], 'b': [1, 2]})
In [20]: df.iloc[0].to_dict()
Out[20]: {'a': [[1], [2]], 'b': 1}
In [21]: pa.Table.from_pandas(df).to_pandas().iloc[0].to_dict()
Out[21]: {'a': array([array([1]), array([2])], dtype=object), 'b': 1}
In [24]: np.array(df.iloc[0].to_dict()['a']).shape
Out[24]: (2, 1)
In [25]: pa.Table.from_pandas(df).to_pandas().iloc[0].to_dict()['a'].shape
Out[25]: (2,)
{code}
Adding extra array type is not functioning as expected.
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