[jira] [Commented] (ARROW-6015) [Python] pyarrow wheel: `DLL load failed` when importing on windows

["Kazuaki Ishizaki (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/ARROW-6015?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16920236#comment-16920236 ] 

Kazuaki Ishizaki commented on ARROW-6015:
-----------------------------------------

After installing numba package to Python, I cannot still find the CRT DLLs under the directory. I think that {{numpy}} statically links the CRT DLLS.


{code}
> cd \python-3.7.4-embed-amd64
> python -m pip install numba
Collecting numba
...
Installing collected packages: llvmlite, numba
Successfully installed llvmlite-0.29.0 numba-0.45.1

> \cygwin64\bin\find . -name "msv*"
./Lib/site-packages/numpy/distutils/msvc9compiler.py
./Lib/site-packages/numpy/distutils/msvccompiler.py
./Lib/site-packages/numpy/distutils/__pycache__/msvc9compiler.cpython-37.pyc
./Lib/site-packages/numpy/distutils/__pycache__/msvccompiler.cpython-37.pyc
./Lib/site-packages/setuptools/msvc.py
./Lib/site-packages/setuptools/__pycache__/msvc.cpython-37.pyc

> python -c "import numba"
> python -c "import numpy"
>  \cygwin64\bin\find . -name "msv*"
./Lib/site-packages/numpy/distutils/msvc9compiler.py
./Lib/site-packages/numpy/distutils/msvccompiler.py
./Lib/site-packages/numpy/distutils/__pycache__/msvc9compiler.cpython-37.pyc
./Lib/site-packages/numpy/distutils/__pycache__/msvccompiler.cpython-37.pyc
./Lib/site-packages/setuptools/msvc.py
./Lib/site-packages/setuptools/__pycache__/msvc.cpython-37.pyc
> type Lib\site-packages\numpy\LICENSE.txt
...
Name: Microsoft Visual C++ Runtime Files
Files: extra-dll\msvcp140.dll
License: MSVC
  https://www.visualstudio.com/license-terms/distributable-code-microsoft-visual-studio-2015-rc-microsoft-visual-studio-2015-sdk-rc-includes-utilities-buildserver-files/#visual-c-runtime

  Subject to the License Terms for the software, you may copy and
  distribute with your program any of the files within the followng
  folder and its subfolders except as noted below. You may not modify
  these files.

    C:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\redist

  You may not distribute the contents of the following folders:

    C:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\redist\debug_nonredist
    C:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\redist\onecore\debug_nonredist

  Subject to the License Terms for the software, you may copy and
  distribute the following files with your program in your programΓÇÖs
  application local folder or by deploying them into the Global
  Assembly Cache (GAC):

  VC\atlmfc\lib\mfcmifc80.dll
  VC\atlmfc\lib\amd64\mfcmifc80.dll


Name: Microsoft Visual C++ Runtime Files
Files: extra-dll\msvc*90.dll, extra-dll\Microsoft.VC90.CRT.manifest
License: MSVC
  For your convenience, we have provided the following folders for
  use when redistributing VC++ runtime files. Subject to the license
  terms for the software, you may redistribute the folder
  (unmodified) in the application local folder as a sub-folder with
  no change to the folder name. You may also redistribute all the
  files (*.dll and *.manifest) within a folder, listed below the
  folder for your convenience, as an entire set.

  \VC\redist\x86\Microsoft.VC90.ATL\
   atl90.dll
   Microsoft.VC90.ATL.manifest
  \VC\redist\ia64\Microsoft.VC90.ATL\
   atl90.dll
   Microsoft.VC90.ATL.manifest
  \VC\redist\amd64\Microsoft.VC90.ATL\
   atl90.dll
   Microsoft.VC90.ATL.manifest
  \VC\redist\x86\Microsoft.VC90.CRT\
   msvcm90.dll
   msvcp90.dll
   msvcr90.dll
   Microsoft.VC90.CRT.manifest
  \VC\redist\ia64\Microsoft.VC90.CRT\
   msvcm90.dll
   msvcp90.dll
   msvcr90.dll
   Microsoft.VC90.CRT.manifest
...
>
{code}

> [Python] pyarrow wheel:  `DLL load failed` when importing on windows
> --------------------------------------------------------------------
>
>                 Key: ARROW-6015
>                 URL: https://issues.apache.org/jira/browse/ARROW-6015
>             Project: Apache Arrow
>          Issue Type: Bug
>          Components: Packaging, Python
>    Affects Versions: 0.14.1
>            Reporter: Ruslan Kuprieiev
>            Priority: Major
>              Labels: wheel
>             Fix For: 0.15.0
>
>
> When installing pyarrow 0.14.1 on windows 10 x64 with python 3.7, you get:
> >>> import pyarrow
> Traceback (most recent call last):
>   File "<stdin>", line 1, in <module>
>   File "C:\Python37\lib\site-packages\pyarrow\__init__.py", line 49, in <module>
>     from pyarrow.lib import cpu_count, set_cpu_count
>   ImportError: DLL load failed: The specified module could not be found.
>  On 0.14.0 everything works fine.



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