Wes McKinney created ARROW-736:
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Summary: [Python] Mixed-type object DataFrame columns should not
silently coerce to an Arrow type by default
Key: ARROW-736
URL: https://issues.apache.org/jira/browse/ARROW-736
Project: Apache Arrow
Issue Type: Bug
Components: Python
Reporter: Wes McKinney
{code}
In [4]: df = pd.DataFrame({'a': ['a', 1, 2.0]})
In [5]: df
Out[5]:
a
0 a
1 1
2 2
In [6]: pt = pa.Table.from_pandas(df)
In [7]: pt.to_pandas()
Out[7]:
a
0 a
1 None
2 None
{code}
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