> I think you need to add:
>
>      export PYARROW_WITH_DATASET=1

This worked, thanks. I think the documentation [1] may need be fixed to clarify 
that DATASET is also an optional component.

[1] https://arrow.apache.org/docs/developers/python.html#build-and-test


Yaron.
________________________________
From: Yaron Gvili <rt...@hotmail.com>
Sent: Tuesday, May 10, 2022 1:24 PM
To: dev@arrow.apache.org <dev@arrow.apache.org>
Subject: Re: PyArrow builds but fails to load pyarrow._dataset

> Does `import pyarrow` work?

Yes. Also, all but one unit test succeeded:

=========================================================================================
 short test summary info 
==========================================================================================
FAILED pyarrow/tests/parquet/test_dataset.py::test_partitioned_dataset[True] - 
ModuleNotFoundError: No module named 'pyarrow._dataset'
============================================================= 1 failed, 3382 
passed, 834 skipped, 17 xfailed, 2 xpassed, 14 warnings in 44.92s 
=============================================================


Yaron.
________________________________
From: Antoine Pitrou <anto...@python.org>
Sent: Tuesday, May 10, 2022 1:17 PM
To: dev@arrow.apache.org <dev@arrow.apache.org>
Subject: Re: PyArrow builds but fails to load pyarrow._dataset



Le 10/05/2022 à 19:16, Antoine Pitrou a écrit :
>
> That said, tests which require should be skipped gracefully instead of
> failing.

Oops... some words got swallowed:

tests which require *the dataset module* should be skipped gracefully
instead of failing.


>
>
> Le 10/05/2022 à 19:13, Weston Pace a écrit :
>> I think you need to add:
>>
>>       export PYARROW_WITH_DATASET=1
>>
>> On Tue, May 10, 2022 at 7:07 AM Yaron Gvili <rt...@hotmail.com> wrote:
>>>
>>> Hello,
>>>
>>> I ran into a problem with running PyArrow that I locally built. The build 
>>> worked fine (or so it seems) but then the testing procedure had a failure 
>>> due to not being able to load pyarrow._dataset, which I manually confirmed. 
>>> I'd appreciate any guidance on how to fix this error.
>>>
>>> Below are the commands I used to build and test along with the failure 
>>> console-output (other console-output, for successful commands, is not 
>>> included), followed by my manual confirmation:
>>>
>>> $ conda activate pyarrow-dev
>>> $ mkdir -p arrow/cpp/build/pyarrow-release
>>> $ pushd arrow/cpp/build/pyarrow-release
>>> $ cmake -GNinja -DCMAKE_INSTALL_PREFIX=$ARROW_HOME 
>>> -DCMAKE_INSTALL_LIBDIR=lib $(for a in COMPUTE DATASET ENGINE FILESYSTEM IPC 
>>> PARQUET PYTHON WITH_BZ2 WITH_ZLIB WITH_ZSTD WITH_LZ4 WITH_SNAPPY 
>>> WITH_BROTLI BUILD_TESTS; do echo "-DARROW_${a}=ON"; done) 
>>> -DPARQUET_REQUIRE_ENCRYPTION=ON ../..
>>> $ ninja -j 6
>>> $ cmake --build . --target install
>>> $ popd
>>> $ pushd arrow/python
>>> $ export PYARROW_WITH_PARQUET=1
>>> $ export PYARROW_WITH_PARQUET_ENCRYPTION=1
>>> $ python setup.py build_ext --inplace
>>> $ python -m pytest pyarrow/
>>> ...
>>> FAILED 
>>> pyarrow/tests/parquet/test_dataset.py::test_partitioned_dataset[True] - 
>>> ModuleNotFoundError: No module named 'pyarrow._dataset'
>>> ...
>>> $ python
>>> Python 3.9.12 | packaged by conda-forge | (main, Mar 24 2022, 23:25:59)
>>> [GCC 10.3.0] on linux
>>> Type "help", "copyright", "credits" or "license" for more information.
>>>>>> import pyarrow._dataset
>>> Traceback (most recent call last):
>>>     File "<stdin>", line 1, in <module>
>>> ModuleNotFoundError: No module named 'pyarrow._dataset'
>>>
>>>
>>> Cheers,
>>> Yaron.

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