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  1. Apache Arrow
  2. ARROW-11445

Type conversion failure on numpy 0.1.20

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Details

    • Bug
    • Status: Closed
    • Major
    • Resolution: Duplicate
    • 2.0.0
    • 3.0.0
    • Python
    • None
    • Python 3.7.4
      Mac OS

    Description

      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': numpy.random.randn(10), 'b': numpy.random.randn(7).tolist() + [None, pandas.NA, numpy.nan], 'c': list(range(9)) + [numpy.nan]})
      >>> 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 float64')
      
      

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              uwe Uwe Korn
              carlomazzaferro Carlo Mazzaferro
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                Updated:
                Resolved: