[ARROW-8685] [Python] ImportError with NumPy<1.16.

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Not A Bug
• Affects Version/s: 0.17.0
• Component/s: Packaging, Python
• External issue URL: https://github.com/apache/arrow/issues/24843
• Assignee: Unassigned
• Reporter: A. Coady
• Created: 04/May/20 03:11
• Updated: 11/Jan/23 08:01
• Resolved: 04/May/20 20:32

Description

# 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.