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https://issues.apache.org/jira/browse/ARROW-1554?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16171969#comment-16171969
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Wes McKinney commented on ARROW-1554:
-------------------------------------
Cool. I changed the JIRA title so that we can add a note to the Sphinx docs
about this issue
> [Python] Document that pip wheels depend on MSVC14 runtime
> ----------------------------------------------------------
>
> Key: ARROW-1554
> URL: https://issues.apache.org/jira/browse/ARROW-1554
> Project: Apache Arrow
> Issue Type: Bug
> Components: Python
> Affects Versions: 0.7.0
> Environment: Windows 10 (x64)
> Python 3.6.2 (x64)
> Reporter: Dima Ryazanov
> Fix For: 0.8.0
>
> Attachments: parquet_dependencies.png, Process Monitor.png
>
>
> I just tried pyarrow on Windows 10, and it fails to import for me:
> {code}
> >>> import pyarrow
> Traceback (most recent call last):
> File "<stdin>", line 1, in <module>
> File "C:\Program Files\Python36\lib\site-packages\pyarrow\__init__.py",
> line 32, in <module>
> from pyarrow.lib import cpu_count, set_cpu_count
> ImportError: DLL load failed: The specified module could not be found.
> {code}
> Not sure which DLL is failing, but I do see some DLLs in the pyarrow folder:
> {code}
> C:\Users\dima\Documents>dir "C:\Program
> Files\Python36\lib\site-packages\pyarrow\"
> Volume in drive C has no label.
> Volume Serial Number is 4CE9-CC3C
> Directory of C:\Program Files\Python36\lib\site-packages\pyarrow
> 09/19/2017 01:14 AM <DIR> .
> 09/19/2017 01:14 AM <DIR> ..
> 09/19/2017 01:14 AM 2,382,336 arrow.dll
> 09/19/2017 01:14 AM 604,160 arrow_python.dll
> 09/19/2017 01:14 AM 3,402 compat.py
> ...
> {code}
> However, I cannot open them using ctypes.cdll. I wonder if some dependency is
> missing?
> {code}
> >>> open('C:\\Program
> >>> Files\\Python36\\Lib\\site-packages\\pyarrow\\parquet.dll', 'rb')
> <_io.BufferedReader name='C:\\Program
> Files\\Python36\\Lib\\site-packages\\pyarrow\\parquet.dll'>
> >>>
> >>> cdll.LoadLibrary('C:\\Program
> >>> Files\\Python36\\Lib\\site-packages\\pyarrow\\parquet.dll')
> Traceback (most recent call last):
> File "<stdin>", line 1, in <module>
> File "C:\Program Files\Python36\lib\ctypes\__init__.py", line 426, in
> LoadLibrary
> return self._dlltype(name)
> File "C:\Program Files\Python36\lib\ctypes\__init__.py", line 348, in
> __init__
> self._handle = _dlopen(self._name, mode)
> OSError: [WinError 126] The specified module could not be found
> {code}
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