[jira] [Created] (ARROW-8685) [Python] ImportError with NumPy<1.16.

["A. Coady (Jira)" <ji...@apache.org>]

A. Coady created ARROW-8685:
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             Summary: [Python] ImportError with NumPy<1.16.
                 Key: ARROW-8685
                 URL: https://issues.apache.org/jira/browse/ARROW-8685
             Project: Apache Arrow
          Issue Type: Bug
          Components: Packaging, Python
    Affects Versions: 0.17.0
            Reporter: A. Coady


# pip install 'numpy<1.16' pyarrow...
Successfully built numpy
Installing collected packages: numpy, pyarrow
Successfully installed numpy-1.15.4 pyarrow-0.17.0
# python -c 'import pyarrow'ModuleNotFoundError: No module named 'numpy.core._multiarray_umath'Traceback (most recent call last):
  File "<string>", line 1, in <module>
  File "/usr/local/lib/python3.8/site-packages/pyarrow/__init__.py", line 59, in <module>
    from pyarrow.lib import cpu_count, set_cpu_count
  File "pyarrow/lib.pyx", line 37, in init pyarrow.lib
ImportError: numpy.core.multiarray failed to import
Arrow's setup.py requires numpy>=1.14, but the actual requirement appears to be >=1.16.  

This is related to ARROW-7852; users will still see an ImportError if an older NumPy was already installed.



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