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[jira] [Created] (ARROW-4074) [Python] test_get_library_dirs_win32 fails if libraries installed someplace different from conda or wheel packages


Wes McKinney created ARROW-4074:
-----------------------------------

             Summary: [Python] test_get_library_dirs_win32 fails if libraries installed someplace different from conda or wheel packages
                 Key: ARROW-4074
                 URL: https://issues.apache.org/jira/browse/ARROW-4074
             Project: Apache Arrow
          Issue Type: Bug
          Components: Python
            Reporter: Wes McKinney
             Fix For: 0.12.0


Following the development instructions in docs/source/python/development.rst I get the following error:

{code}
    @pytest.mark.skipif('sys.platform != "win32"')
    def test_get_library_dirs_win32():
        library_dirs = pa.get_library_dirs()

        library_lib = library_dirs[-1]
>       assert os.path.exists(os.path.join(library_lib, 'arrow.lib'))
E       AssertionError: assert False
E        +  where False = <function exists at 0x0000018CDDDD8AE8>('C:\\Users\\wesm\\code\\arrow\\python\\pyarrow\\arrow.lib')
E        +    where <function exists at 0x0000018CDDDD8AE8> = <module 'ntpath' from 'C:\\Miniconda3\\envs\\pyarrow-dev\\lib\\ntpath.py'>.exists
E        +      where <module 'ntpath' from 'C:\\Miniconda3\\envs\\pyarrow-dev\\lib\\ntpath.py'> = os.path
E        +    and   'C:\\Users\\wesm\\code\\arrow\\python\\pyarrow\\arrow.lib' = <function join at 0x0000018CDDE092F0>('C:\\Users\\wesm\\code\\arrow\\python\\pyarrow', 'arrow.lib')
E        +      where <function join at 0x0000018CDDE092F0> = <module 'ntpath' from 'C:\\Miniconda3\\envs\\pyarrow-dev\\lib\\ntpath.py'>.join
E        +        where <module 'ntpath' from 'C:\\Miniconda3\\envs\\pyarrow-dev\\lib\\ntpath.py'> = os.path

pyarrow\tests\test_misc.py:34: AssertionError
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> entering PDB >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
> c:\users\wesm\code\arrow\python\pyarrow\tests\test_misc.py(34)test_get_library_dirs_win32()
-> assert os.path.exists(os.path.join(library_lib, 'arrow.lib'))
(Pdb) p library_lib
'C:\\Users\\wesm\\code\\arrow\\python\\pyarrow'
(Pdb) p library_dirs
['C:\\Users\\wesm\\code\\arrow\\python\\pyarrow']
(Pdb) pa.get_library_dirs()
['C:\\Users\\wesm\\code\\arrow\\python\\pyarrow']
{code}

I have the libraries in {{C:\thirdparty\lib}}, and ARROW_HOME is set to {{C:\thirdparty}} per the instructions. Maybe we can add the ARROW_HOME env variably if set to the candidate directories



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