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https://issues.apache.org/jira/browse/ARROW-230?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15588843#comment-15588843
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Wes McKinney commented on ARROW-230:
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This problem is caused by setuptools because {{bin/cython}}, which has been
munged by setuptools to import {{pkg_resources}} is being invoked in the same
directory where the built shared libraries are being created. I don't think
that renaming the module is the approriate fix, will require some tweaks to the
way the Cython modules are being built in the CMakeLists.txt
> Python: Do not name modules like native ones (i.e. rename pyarrow.io)
> ---------------------------------------------------------------------
>
> Key: ARROW-230
> URL: https://issues.apache.org/jira/browse/ARROW-230
> Project: Apache Arrow
> Issue Type: Bug
> Components: Python
> Reporter: Uwe L. Korn
>
> Although you can rename it in imports, still weird stuff can happen.
> E.g. if you re-run make in the build directory (only happens probably if you
> change pyarrow's CMakeLists.txt and do not call it via setup.py) you will get
> the following error:
> {noformat}
> -- Found Python lib /usr/lib/x86_64-linux-gnu/libpython2.7.so
> CMake Error at cmake_modules/FindNumPy.cmake:62 (message):
> NumPy import failure:
> Traceback (most recent call last):
> File "<string>", line 1, in <module>
> File
> "/home/uwe/.virtualenvs/pyarrow/local/lib/python2.7/site-packages/numpy/__init__.py",
> line 180, in <module>
> from . import add_newdocs
> File
> "/home/uwe/.virtualenvs/pyarrow/local/lib/python2.7/site-packages/numpy/add_newdocs.py",
> line 13, in <module>
> from numpy.lib import add_newdoc
> File
> "/home/uwe/.virtualenvs/pyarrow/local/lib/python2.7/site-packages/numpy/lib/__init__.py",
> line 8, in <module>
> from .type_check import *
> File
> "/home/uwe/.virtualenvs/pyarrow/local/lib/python2.7/site-packages/numpy/lib/type_check.py",
> line 11, in <module>
> import numpy.core.numeric as _nx
> File
> "/home/uwe/.virtualenvs/pyarrow/local/lib/python2.7/site-packages/numpy/core/__init__.py",
> line 58, in <module>
> from numpy.testing import Tester
> File
> "/home/uwe/.virtualenvs/pyarrow/local/lib/python2.7/site-packages/numpy/testing/__init__.py",
> line 14, in <module>
> from .utils import *
> File
> "/home/uwe/.virtualenvs/pyarrow/local/lib/python2.7/site-packages/numpy/testing/utils.py",
> line 15, in <module>
> from tempfile import mkdtemp
> File "/usr/lib/python2.7/tempfile.py", line 32, in <module>
> import io as _io
> ImportError:
>
> /home/uwe/Development/arrow/python/build/temp.linux-x86_64-2.7/./libpyarrow.so:
> undefined symbol: pyarrow_ARRAY_API
> Call Stack (most recent call first):
> CMakeLists.txt:223 (find_package)
> {noformat}
> The actual error message here is confusing but the basic problem is that here
> the wrong io module is imported.
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