Carlo Mazzaferro created ARROW-11445:
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Summary: Type conversion failure on numpy 0.1.20
Key: ARROW-11445
URL: https://issues.apache.org/jira/browse/ARROW-11445
Project: Apache Arrow
Issue Type: Bug
Components: Python
Affects Versions: 2.0.0
Environment: Python 3.7.4
Mac OS
Reporter: Carlo Mazzaferro
While I have not dug deep enough in the Arrow codebase, it seems to me that
this is caused by the new numpy release:
[https://github.com/numpy/numpy/releases]
The issue below in fact is not observed when using numpy 0.19.*
{{>>> pandas.__version__, pa.__version__, numpy.__version__}}
{{('1.2.1', '2.0.0', '1.20.0')}}
{{>>> df = pandas.DataFrame(\{'a': [1,2,3]})}}
{{>>> pandas.__version__, pa.__version__, numpy.__version__}}
{{('1.2.1', '2.0.0', '1.20.0')}}
{{>>> df = pandas.DataFrame(\{'a': [1,2,3]})}}
{{>>> pa.Table.from_pandas(df)}}
{{Traceback (most recent call last):}}
{{ File "<input>", line 1, in <module>}}
{{ pa.Table.from_pandas(df)}}
{{ File "pyarrow/table.pxi", line 1394, in pyarrow.lib.Table.from_pandas}}
{{ File
"/Users/carlomazzafero/.virtualenvs/arr/lib/python3.7/site-packages/pyarrow/pandas_compat.py",
line 588, in dataframe_to_arrays}}
{{ for c, f in zip(columns_to_convert, convert_fields)]}}
{{ File
"/Users/carlomazzafero/.virtualenvs/arr/lib/python3.7/site-packages/pyarrow/pandas_compat.py",
line 588, in <listcomp>}}
{{ for c, f in zip(columns_to_convert, convert_fields)]}}
{{ File
"/Users/carlomazzafero/.virtualenvs/arr/lib/python3.7/site-packages/pyarrow/pandas_compat.py",
line 574, in convert_column}}
{{ raise e}}
{{ File
"/Users/carlomazzafero/.virtualenvs/arr/lib/python3.7/site-packages/pyarrow/pandas_compat.py",
line 568, in convert_column}}
{{ result = pa.array(col, type=type_, from_pandas=True, safe=safe)}}
{{ File "pyarrow/array.pxi", line 292, in pyarrow.lib.array}}
{{ File "pyarrow/array.pxi", line 79, in pyarrow.lib._ndarray_to_array}}
{{ File "pyarrow/array.pxi", line 67, in pyarrow.lib._ndarray_to_type}}
{{ File "pyarrow/error.pxi", line 107, in pyarrow.lib.check_status}}
{{pyarrow.lib.ArrowTypeError: ('Did not pass numpy.dtype object', 'Conversion
failed for column a with type int64')}}
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