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Krisztian Szucs commented on ARROW-2101: ---------------------------------------- I thins here https://github.com/apache/arrow/blob/master/cpp/src/arrow/python/numpy_to_arrow.cc#L839 is the relevant code, the comments nicely explain what happens. The example with explicit string datatype presumes the opposite direction. Of course a high level decode('utf-8') would work. What is the preferred way to do this kind of conversions? > [Python] from_pandas reads 'str' type as binary Arrow data with Python 2 > ------------------------------------------------------------------------ > > Key: ARROW-2101 > URL: https://issues.apache.org/jira/browse/ARROW-2101 > Project: Apache Arrow > Issue Type: Bug > Components: Python > Affects Versions: 0.8.0 > Reporter: Bryan Cutler > Priority: Major > > Using Python 2, converting Pandas with 'str' data to Arrow results in Arrow > data of binary type, even if the user supplies type information. conversion > of 'unicode' type works to create Arrow data of string types. For example > {code} > In [25]: pa.Array.from_pandas(pd.Series(['a'])).type > Out[25]: DataType(binary) > In [26]: pa.Array.from_pandas(pd.Series(['a']), type=pa.string()).type > Out[26]: DataType(binary) > In [27]: pa.Array.from_pandas(pd.Series([u'a'])).type > Out[27]: DataType(string) > {code} -- This message was sent by Atlassian JIRA (v7.6.3#76005)