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https://issues.apache.org/jira/browse/ARROW-5161?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Rok Mihevc updated ARROW-5161:
------------------------------
External issue URL: https://github.com/apache/arrow/issues/21640
> [Python] Cannot convert struct type from Pandas object column
> -------------------------------------------------------------
>
> Key: ARROW-5161
> URL: https://issues.apache.org/jira/browse/ARROW-5161
> Project: Apache Arrow
> Issue Type: Bug
> Components: Python
> Affects Versions: 0.13.0
> Reporter: Antoine Pitrou
> Priority: Major
> Fix For: 0.15.0
>
>
> As reported on [https://github.com/apache/arrow/issues/4045]. Interestingly,
> the datatype is inferred correctly.
> {code:python}
> >>> df = pd.DataFrame({'col': [{'ints': 5, 'strs': 'foo'}, {'ints': 6,
> >>> 'strs': 'bar'}]})
> >>>
> >>> df
> >>>
> >>>
> col
> 0 {'ints': 5, 'strs': 'foo'}
> 1 {'ints': 6, 'strs': 'bar'}
> >>> pa.Table.from_pandas(df)
> >>>
> >>>
> Traceback (most recent call last):
> File "<ipython-input-16-6eac5d0eec08>", line 1, in <module>
> pa.Table.from_pandas(df)
> File "pyarrow/table.pxi", line 1139, in pyarrow.lib.Table.from_pandas
> names, arrays, metadata = dataframe_to_arrays(
> File "/home/antoine/arrow/dev/python/pyarrow/pandas_compat.py", line 480,
> in dataframe_to_arrays
> types)
> File "/home/antoine/arrow/dev/python/pyarrow/pandas_compat.py", line 209,
> in construct_metadata
> field_name=sanitized_name)
> File "/home/antoine/arrow/dev/python/pyarrow/pandas_compat.py", line 151,
> in get_column_metadata
> logical_type = get_logical_type(arrow_type)
> File "/home/antoine/arrow/dev/python/pyarrow/pandas_compat.py", line 79, in
> get_logical_type
> raise NotImplementedError(str(arrow_type))
> NotImplementedError: struct<ints: int64, strs: string>
> {code}
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