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| |
| <section id="python-development"> |
| <span id="id1"></span><h1>Python Development<a class="headerlink" href="#python-development" title="Permalink to this heading">¶</a></h1> |
| <p>This page provides general Python development guidelines and source build |
| instructions for all platforms.</p> |
| <section id="coding-style"> |
| <h2>Coding Style<a class="headerlink" href="#coding-style" title="Permalink to this heading">¶</a></h2> |
| <p>We follow a similar PEP8-like coding style to the <a class="reference external" href="https://github.com/pandas-dev/pandas">pandas project</a>. To check style issues, use the |
| <a class="reference internal" href="continuous_integration/archery.html#archery"><span class="std std-ref">Archery</span></a> subcommand <code class="docutils literal notranslate"><span class="pre">lint</span></code>:</p> |
| <div class="highlight-console notranslate"><div class="highlight"><pre><span></span><span class="gp">$ </span>pip<span class="w"> </span>install<span class="w"> </span>-e<span class="w"> </span><span class="s2">"arrow/dev/archery[lint]"</span> |
| </pre></div> |
| </div> |
| <div class="highlight-console notranslate"><div class="highlight"><pre><span></span><span class="gp">$ </span>archery<span class="w"> </span>lint<span class="w"> </span>--python |
| </pre></div> |
| </div> |
| <p>Some of the issues can be automatically fixed by passing the <code class="docutils literal notranslate"><span class="pre">--fix</span></code> option:</p> |
| <div class="highlight-console notranslate"><div class="highlight"><pre><span></span><span class="gp">$ </span>archery<span class="w"> </span>lint<span class="w"> </span>--python<span class="w"> </span>--fix |
| </pre></div> |
| </div> |
| <p>The Python code base also includes some C++ files. To fix formatting in those |
| files, add the <code class="docutils literal notranslate"><span class="pre">--clang-format</span></code> option:</p> |
| <div class="highlight-console notranslate"><div class="highlight"><pre><span></span><span class="gp">$ </span>archery<span class="w"> </span>lint<span class="w"> </span>--python<span class="w"> </span>--clang-format<span class="w"> </span>--fix |
| </pre></div> |
| </div> |
| </section> |
| <section id="unit-testing"> |
| <span id="python-unit-testing"></span><h2>Unit Testing<a class="headerlink" href="#unit-testing" title="Permalink to this heading">¶</a></h2> |
| <p>We are using <a class="reference external" href="https://docs.pytest.org/en/latest/">pytest</a> to develop our unit |
| test suite. After building the project (see below) you can run its unit tests |
| like so:</p> |
| <div class="highlight-console notranslate"><div class="highlight"><pre><span></span><span class="gp">$ </span><span class="nb">pushd</span><span class="w"> </span>arrow/python |
| <span class="gp">$ </span>python<span class="w"> </span>-m<span class="w"> </span>pytest<span class="w"> </span>pyarrow |
| <span class="gp">$ </span><span class="nb">popd</span> |
| </pre></div> |
| </div> |
| <p>Package requirements to run the unit tests are found in |
| <code class="docutils literal notranslate"><span class="pre">requirements-test.txt</span></code> and can be installed if needed with <code class="docutils literal notranslate"><span class="pre">pip</span> <span class="pre">install</span> <span class="pre">-r</span> |
| <span class="pre">requirements-test.txt</span></code>.</p> |
| <p>If you get import errors for <code class="docutils literal notranslate"><span class="pre">pyarrow._lib</span></code> or another PyArrow module when |
| trying to run the tests, run <code class="docutils literal notranslate"><span class="pre">python</span> <span class="pre">-m</span> <span class="pre">pytest</span> <span class="pre">arrow/python/pyarrow</span></code> and check |
| if the editable version of pyarrow was installed correctly.</p> |
| <p>The project has a number of custom command line options for its test |
| suite. Some tests are disabled by default, for example. To see all the options, |
| run</p> |
| <div class="highlight-console notranslate"><div class="highlight"><pre><span></span><span class="gp">$ </span>python<span class="w"> </span>-m<span class="w"> </span>pytest<span class="w"> </span>pyarrow<span class="w"> </span>--help |
| </pre></div> |
| </div> |
| <p>and look for the “custom options” section.</p> |
| <div class="admonition note"> |
| <p class="admonition-title">Note</p> |
| <p>There are a few low-level tests written directly in C++. These tests are |
| implemented in <a class="reference external" href="https://github.com/apache/arrow/blob/main/python/pyarrow/src/python_test.cc">pyarrow/src/python_test.cc</a>, |
| but they are also wrapped in a <code class="docutils literal notranslate"><span class="pre">pytest</span></code>-based |
| <a class="reference external" href="https://github.com/apache/arrow/blob/main/python/pyarrow/tests/test_cpp_internals.py">test module</a> |
| run automatically as part of the PyArrow test suite.</p> |
| </div> |
| <section id="test-groups"> |
| <h3>Test Groups<a class="headerlink" href="#test-groups" title="Permalink to this heading">¶</a></h3> |
| <p>We have many tests that are grouped together using pytest marks. Some of these |
| are disabled by default. To enable a test group, pass <code class="docutils literal notranslate"><span class="pre">--$GROUP_NAME</span></code>, |
| e.g. <code class="docutils literal notranslate"><span class="pre">--parquet</span></code>. To disable a test group, prepend <code class="docutils literal notranslate"><span class="pre">disable</span></code>, so |
| <code class="docutils literal notranslate"><span class="pre">--disable-parquet</span></code> for example. To run <strong>only</strong> the unit tests for a |
| particular group, prepend <code class="docutils literal notranslate"><span class="pre">only-</span></code> instead, for example <code class="docutils literal notranslate"><span class="pre">--only-parquet</span></code>.</p> |
| <p>The test groups currently include:</p> |
| <ul class="simple"> |
| <li><p><code class="docutils literal notranslate"><span class="pre">dataset</span></code>: Apache Arrow Dataset tests</p></li> |
| <li><p><code class="docutils literal notranslate"><span class="pre">flight</span></code>: Flight RPC tests</p></li> |
| <li><p><code class="docutils literal notranslate"><span class="pre">gandiva</span></code>: tests for Gandiva expression compiler (uses LLVM)</p></li> |
| <li><p><code class="docutils literal notranslate"><span class="pre">hdfs</span></code>: tests that use libhdfs to access the Hadoop filesystem</p></li> |
| <li><p><code class="docutils literal notranslate"><span class="pre">hypothesis</span></code>: tests that use the <code class="docutils literal notranslate"><span class="pre">hypothesis</span></code> module for generating |
| random test cases. Note that <code class="docutils literal notranslate"><span class="pre">--hypothesis</span></code> doesn’t work due to a quirk |
| with pytest, so you have to pass <code class="docutils literal notranslate"><span class="pre">--enable-hypothesis</span></code></p></li> |
| <li><p><code class="docutils literal notranslate"><span class="pre">large_memory</span></code>: Test requiring a large amount of system RAM</p></li> |
| <li><p><code class="docutils literal notranslate"><span class="pre">orc</span></code>: Apache ORC tests</p></li> |
| <li><p><code class="docutils literal notranslate"><span class="pre">parquet</span></code>: Apache Parquet tests</p></li> |
| <li><p><code class="docutils literal notranslate"><span class="pre">s3</span></code>: Tests for Amazon S3</p></li> |
| <li><p><code class="docutils literal notranslate"><span class="pre">tensorflow</span></code>: Tests that involve TensorFlow</p></li> |
| </ul> |
| </section> |
| <section id="doctest"> |
| <h3>Doctest<a class="headerlink" href="#doctest" title="Permalink to this heading">¶</a></h3> |
| <p>We are using <a class="reference external" href="https://docs.python.org/3/library/doctest.html">doctest</a> |
| to check that docstring examples are up-to-date and correct. You can |
| also do that locally by running:</p> |
| <div class="highlight-console notranslate"><div class="highlight"><pre><span></span><span class="gp">$ </span><span class="nb">pushd</span><span class="w"> </span>arrow/python |
| <span class="gp">$ </span>python<span class="w"> </span>-m<span class="w"> </span>pytest<span class="w"> </span>--doctest-modules |
| <span class="gp">$ </span>python<span class="w"> </span>-m<span class="w"> </span>pytest<span class="w"> </span>--doctest-modules<span class="w"> </span>path/to/module.py<span class="w"> </span><span class="c1"># checking single file</span> |
| <span class="gp">$ </span><span class="nb">popd</span> |
| </pre></div> |
| </div> |
| <p>for <code class="docutils literal notranslate"><span class="pre">.py</span></code> files or</p> |
| <div class="highlight-console notranslate"><div class="highlight"><pre><span></span><span class="gp">$ </span><span class="nb">pushd</span><span class="w"> </span>arrow/python |
| <span class="gp">$ </span>python<span class="w"> </span>-m<span class="w"> </span>pytest<span class="w"> </span>--doctest-cython |
| <span class="gp">$ </span>python<span class="w"> </span>-m<span class="w"> </span>pytest<span class="w"> </span>--doctest-cython<span class="w"> </span>path/to/module.pyx<span class="w"> </span><span class="c1"># checking single file</span> |
| <span class="gp">$ </span><span class="nb">popd</span> |
| </pre></div> |
| </div> |
| <p>for <code class="docutils literal notranslate"><span class="pre">.pyx</span></code> and <code class="docutils literal notranslate"><span class="pre">.pxi</span></code> files. In this case you will also need to |
| install the <a class="reference external" href="https://github.com/lgpage/pytest-cython">pytest-cython</a> plugin.</p> |
| </section> |
| <section id="benchmarking"> |
| <h3>Benchmarking<a class="headerlink" href="#benchmarking" title="Permalink to this heading">¶</a></h3> |
| <p>For running the benchmarks, see <a class="reference internal" href="../python/benchmarks.html#python-benchmarks"><span class="std std-ref">Benchmarks</span></a>.</p> |
| </section> |
| </section> |
| <section id="building-on-linux-and-macos"> |
| <span id="build-pyarrow"></span><h2>Building on Linux and macOS<a class="headerlink" href="#building-on-linux-and-macos" title="Permalink to this heading">¶</a></h2> |
| <section id="system-requirements"> |
| <h3>System Requirements<a class="headerlink" href="#system-requirements" title="Permalink to this heading">¶</a></h3> |
| <p>On macOS, any modern XCode (6.4 or higher; the current version is 13) or |
| Xcode Command Line Tools (<code class="docutils literal notranslate"><span class="pre">xcode-select</span> <span class="pre">--install</span></code>) are sufficient.</p> |
| <p>On Linux, for this guide, we require a minimum of gcc 4.8 or clang 3.7. |
| You can check your version by running</p> |
| <div class="highlight-console notranslate"><div class="highlight"><pre><span></span><span class="gp">$ </span>gcc<span class="w"> </span>--version |
| </pre></div> |
| </div> |
| <p>If the system compiler is older than gcc 4.8, it can be set to a newer version |
| using the <code class="docutils literal notranslate"><span class="pre">$CC</span></code> and <code class="docutils literal notranslate"><span class="pre">$CXX</span></code> environment variables:</p> |
| <div class="highlight-console notranslate"><div class="highlight"><pre><span></span><span class="gp">$ </span><span class="nb">export</span><span class="w"> </span><span class="nv">CC</span><span class="o">=</span>gcc-4.8 |
| <span class="gp">$ </span><span class="nb">export</span><span class="w"> </span><span class="nv">CXX</span><span class="o">=</span>g++-4.8 |
| </pre></div> |
| </div> |
| </section> |
| <section id="environment-setup-and-build"> |
| <h3>Environment Setup and Build<a class="headerlink" href="#environment-setup-and-build" title="Permalink to this heading">¶</a></h3> |
| <p>First, let’s clone the Arrow git repository:</p> |
| <div class="highlight-console notranslate"><div class="highlight"><pre><span></span><span class="gp">$ </span>git<span class="w"> </span>clone<span class="w"> </span>https://github.com/apache/arrow.git |
| </pre></div> |
| </div> |
| <p>Pull in the test data and setup the environment variables:</p> |
| <div class="highlight-console notranslate"><div class="highlight"><pre><span></span><span class="gp">$ </span><span class="nb">pushd</span><span class="w"> </span>arrow |
| <span class="gp">$ </span>git<span class="w"> </span>submodule<span class="w"> </span>update<span class="w"> </span>--init |
| <span class="gp">$ </span><span class="nb">export</span><span class="w"> </span><span class="nv">PARQUET_TEST_DATA</span><span class="o">=</span><span class="s2">"</span><span class="si">${</span><span class="nv">PWD</span><span class="si">}</span><span class="s2">/cpp/submodules/parquet-testing/data"</span> |
| <span class="gp">$ </span><span class="nb">export</span><span class="w"> </span><span class="nv">ARROW_TEST_DATA</span><span class="o">=</span><span class="s2">"</span><span class="si">${</span><span class="nv">PWD</span><span class="si">}</span><span class="s2">/testing/data"</span> |
| <span class="gp">$ </span><span class="nb">popd</span> |
| </pre></div> |
| </div> |
| <section id="using-conda"> |
| <h4>Using Conda<a class="headerlink" href="#using-conda" title="Permalink to this heading">¶</a></h4> |
| <p>The <a class="reference external" href="https://conda.io/">conda</a> package manager allows installing build-time |
| dependencies for Arrow C++ and PyArrow as pre-built binaries, which can make |
| Arrow development easier and faster.</p> |
| <p>Let’s create a conda environment with all the C++ build and Python dependencies |
| from conda-forge, targeting development for Python 3.10:</p> |
| <p>On Linux and macOS:</p> |
| <div class="highlight-console notranslate"><div class="highlight"><pre><span></span><span class="gp">$ </span>conda<span class="w"> </span>create<span class="w"> </span>-y<span class="w"> </span>-n<span class="w"> </span>pyarrow-dev<span class="w"> </span>-c<span class="w"> </span>conda-forge<span class="w"> </span><span class="se">\</span> |
| <span class="w"> </span>--file<span class="w"> </span>arrow/ci/conda_env_unix.txt<span class="w"> </span><span class="se">\</span> |
| <span class="w"> </span>--file<span class="w"> </span>arrow/ci/conda_env_cpp.txt<span class="w"> </span><span class="se">\</span> |
| <span class="w"> </span>--file<span class="w"> </span>arrow/ci/conda_env_python.txt<span class="w"> </span><span class="se">\</span> |
| <span class="w"> </span>--file<span class="w"> </span>arrow/ci/conda_env_gandiva.txt<span class="w"> </span><span class="se">\</span> |
| <span class="w"> </span>compilers<span class="w"> </span><span class="se">\</span> |
| <span class="w"> </span><span class="nv">python</span><span class="o">=</span><span class="m">3</span>.10<span class="w"> </span><span class="se">\</span> |
| <span class="w"> </span>pandas |
| </pre></div> |
| </div> |
| <p>As of January 2019, the <code class="docutils literal notranslate"><span class="pre">compilers</span></code> package is needed on many Linux |
| distributions to use packages from conda-forge.</p> |
| <p>With this out of the way, you can now activate the conda environment</p> |
| <div class="highlight-console notranslate"><div class="highlight"><pre><span></span><span class="gp">$ </span>conda<span class="w"> </span>activate<span class="w"> </span>pyarrow-dev |
| </pre></div> |
| </div> |
| <p>For Windows, see the <a class="reference internal" href="#building-on-windows">Building on Windows</a> section below.</p> |
| <p>We need to set some environment variables to let Arrow’s build system know |
| about our build toolchain:</p> |
| <div class="highlight-console notranslate"><div class="highlight"><pre><span></span><span class="gp">$ </span><span class="nb">export</span><span class="w"> </span><span class="nv">ARROW_HOME</span><span class="o">=</span><span class="nv">$CONDA_PREFIX</span> |
| </pre></div> |
| </div> |
| </section> |
| <section id="using-system-and-bundled-dependencies"> |
| <h4>Using system and bundled dependencies<a class="headerlink" href="#using-system-and-bundled-dependencies" title="Permalink to this heading">¶</a></h4> |
| <div class="admonition warning"> |
| <p class="admonition-title">Warning</p> |
| <p>If you installed Python using the Anaconda distribution or <a class="reference external" href="https://conda.io/miniconda.html">Miniconda</a>, you cannot currently use a |
| pip-based virtual environment. Please follow the conda-based development |
| instructions instead.</p> |
| </div> |
| <p>If not using conda, you must arrange for your system to provide the required |
| build tools and dependencies. Note that if some dependencies are absent, |
| the Arrow C++ build chain may still be able to download and compile them |
| on the fly, but this will take a longer time than with pre-installed binaries.</p> |
| <p id="python-homebrew">On macOS, use Homebrew to install all dependencies required for |
| building Arrow C++:</p> |
| <div class="highlight-console notranslate"><div class="highlight"><pre><span></span><span class="gp">$ </span>brew<span class="w"> </span>update<span class="w"> </span><span class="o">&&</span><span class="w"> </span>brew<span class="w"> </span>bundle<span class="w"> </span>--file<span class="o">=</span>arrow/cpp/Brewfile |
| </pre></div> |
| </div> |
| <p>See <a class="reference internal" href="cpp/building.html#cpp-build-dependency-management"><span class="std std-ref">here</span></a> for a list of dependencies you |
| may need.</p> |
| <p>On Debian/Ubuntu, you need the following minimal set of dependencies:</p> |
| <div class="highlight-console notranslate"><div class="highlight"><pre><span></span><span class="gp">$ </span>sudo<span class="w"> </span>apt-get<span class="w"> </span>install<span class="w"> </span>build-essential<span class="w"> </span>cmake<span class="w"> </span>python3-dev |
| </pre></div> |
| </div> |
| <p>Now, let’s create a Python virtual environment with all Python dependencies |
| in the same folder as the repositories, and a target installation folder:</p> |
| <div class="highlight-console notranslate"><div class="highlight"><pre><span></span><span class="gp">$ </span>python3<span class="w"> </span>-m<span class="w"> </span>venv<span class="w"> </span>pyarrow-dev |
| <span class="gp">$ </span><span class="nb">source</span><span class="w"> </span>./pyarrow-dev/bin/activate |
| <span class="gp">$ </span>pip<span class="w"> </span>install<span class="w"> </span>-r<span class="w"> </span>arrow/python/requirements-build.txt |
| |
| <span class="gp">$ </span><span class="c1"># This is the folder where we will install the Arrow libraries during</span> |
| <span class="gp">$ </span><span class="c1"># development</span> |
| <span class="gp">$ </span>mkdir<span class="w"> </span>dist |
| </pre></div> |
| </div> |
| <p>If your CMake version is too old on Linux, you could get a newer one via |
| <code class="docutils literal notranslate"><span class="pre">pip</span> <span class="pre">install</span> <span class="pre">cmake</span></code>.</p> |
| <p>We need to set some environment variables to let Arrow’s build system know |
| about our build toolchain:</p> |
| <div class="highlight-console notranslate"><div class="highlight"><pre><span></span><span class="gp">$ </span><span class="nb">export</span><span class="w"> </span><span class="nv">ARROW_HOME</span><span class="o">=</span><span class="k">$(</span><span class="nb">pwd</span><span class="k">)</span>/dist |
| <span class="gp">$ </span><span class="nb">export</span><span class="w"> </span><span class="nv">LD_LIBRARY_PATH</span><span class="o">=</span><span class="k">$(</span><span class="nb">pwd</span><span class="k">)</span>/dist/lib:<span class="nv">$LD_LIBRARY_PATH</span> |
| <span class="gp">$ </span><span class="nb">export</span><span class="w"> </span><span class="nv">CMAKE_PREFIX_PATH</span><span class="o">=</span><span class="nv">$ARROW_HOME</span>:<span class="nv">$CMAKE_PREFIX_PATH</span> |
| </pre></div> |
| </div> |
| </section> |
| </section> |
| <section id="build-and-test"> |
| <h3>Build and test<a class="headerlink" href="#build-and-test" title="Permalink to this heading">¶</a></h3> |
| <p>Now build the Arrow C++ libraries and install them into the directory we |
| created above (stored in <code class="docutils literal notranslate"><span class="pre">$ARROW_HOME</span></code>):</p> |
| <div class="highlight-console notranslate"><div class="highlight"><pre><span></span><span class="gp">$ </span>mkdir<span class="w"> </span>arrow/cpp/build |
| <span class="gp">$ </span><span class="nb">pushd</span><span class="w"> </span>arrow/cpp/build |
| <span class="gp">$ </span>cmake<span class="w"> </span>-DCMAKE_INSTALL_PREFIX<span class="o">=</span><span class="nv">$ARROW_HOME</span><span class="w"> </span><span class="se">\</span> |
| <span class="w"> </span>-DCMAKE_INSTALL_LIBDIR<span class="o">=</span>lib<span class="w"> </span><span class="se">\</span> |
| <span class="w"> </span>-DCMAKE_BUILD_TYPE<span class="o">=</span>Debug<span class="w"> </span><span class="se">\</span> |
| <span class="w"> </span>-DARROW_BUILD_TESTS<span class="o">=</span>ON<span class="w"> </span><span class="se">\</span> |
| <span class="w"> </span>-DARROW_COMPUTE<span class="o">=</span>ON<span class="w"> </span><span class="se">\</span> |
| <span class="w"> </span>-DARROW_CSV<span class="o">=</span>ON<span class="w"> </span><span class="se">\</span> |
| <span class="w"> </span>-DARROW_DATASET<span class="o">=</span>ON<span class="w"> </span><span class="se">\</span> |
| <span class="w"> </span>-DARROW_FILESYSTEM<span class="o">=</span>ON<span class="w"> </span><span class="se">\</span> |
| <span class="w"> </span>-DARROW_HDFS<span class="o">=</span>ON<span class="w"> </span><span class="se">\</span> |
| <span class="w"> </span>-DARROW_JSON<span class="o">=</span>ON<span class="w"> </span><span class="se">\</span> |
| <span class="w"> </span>-DARROW_PARQUET<span class="o">=</span>ON<span class="w"> </span><span class="se">\</span> |
| <span class="w"> </span>-DARROW_WITH_BROTLI<span class="o">=</span>ON<span class="w"> </span><span class="se">\</span> |
| <span class="w"> </span>-DARROW_WITH_BZ2<span class="o">=</span>ON<span class="w"> </span><span class="se">\</span> |
| <span class="w"> </span>-DARROW_WITH_LZ4<span class="o">=</span>ON<span class="w"> </span><span class="se">\</span> |
| <span class="w"> </span>-DARROW_WITH_SNAPPY<span class="o">=</span>ON<span class="w"> </span><span class="se">\</span> |
| <span class="w"> </span>-DARROW_WITH_ZLIB<span class="o">=</span>ON<span class="w"> </span><span class="se">\</span> |
| <span class="w"> </span>-DARROW_WITH_ZSTD<span class="o">=</span>ON<span class="w"> </span><span class="se">\</span> |
| <span class="w"> </span>-DPARQUET_REQUIRE_ENCRYPTION<span class="o">=</span>ON<span class="w"> </span><span class="se">\</span> |
| <span class="w"> </span>.. |
| <span class="gp">$ </span>make<span class="w"> </span>-j4 |
| <span class="gp">$ </span>make<span class="w"> </span>install |
| <span class="gp">$ </span><span class="nb">popd</span> |
| </pre></div> |
| </div> |
| <p>There are a number of optional components that can be switched ON by |
| adding flags with <code class="docutils literal notranslate"><span class="pre">ON</span></code>:</p> |
| <ul class="simple"> |
| <li><p><code class="docutils literal notranslate"><span class="pre">ARROW_CUDA</span></code>: Support for CUDA-enabled GPUs</p></li> |
| <li><p><code class="docutils literal notranslate"><span class="pre">ARROW_DATASET</span></code>: Support for Apache Arrow Dataset</p></li> |
| <li><p><code class="docutils literal notranslate"><span class="pre">ARROW_FLIGHT</span></code>: Flight RPC framework</p></li> |
| <li><p><code class="docutils literal notranslate"><span class="pre">ARROW_GANDIVA</span></code>: LLVM-based expression compiler</p></li> |
| <li><p><code class="docutils literal notranslate"><span class="pre">ARROW_ORC</span></code>: Support for Apache ORC file format</p></li> |
| <li><p><code class="docutils literal notranslate"><span class="pre">ARROW_PARQUET</span></code>: Support for Apache Parquet file format</p></li> |
| <li><p><code class="docutils literal notranslate"><span class="pre">PARQUET_REQUIRE_ENCRYPTION</span></code>: Support for Parquet Modular Encryption</p></li> |
| </ul> |
| <p>Anything set to <code class="docutils literal notranslate"><span class="pre">ON</span></code> above can also be turned off. Note that some compression |
| libraries are recommended for full Parquet support.</p> |
| <p>You may choose between different kinds of C++ build types:</p> |
| <ul class="simple"> |
| <li><p><code class="docutils literal notranslate"><span class="pre">-DCMAKE_BUILD_TYPE=Release</span></code> (the default) produces a build with optimizations |
| enabled and debugging information disabled;</p></li> |
| <li><p><code class="docutils literal notranslate"><span class="pre">-DCMAKE_BUILD_TYPE=Debug</span></code> produces a build with optimizations |
| disabled and debugging information enabled;</p></li> |
| <li><p><code class="docutils literal notranslate"><span class="pre">-DCMAKE_BUILD_TYPE=RelWithDebInfo</span></code> produces a build with both optimizations |
| and debugging information enabled.</p></li> |
| </ul> |
| <div class="admonition seealso"> |
| <p class="admonition-title">See also</p> |
| <p><a class="reference internal" href="cpp/building.html#cpp-building-building"><span class="std std-ref">Building Arrow C++</span></a>.</p> |
| </div> |
| <p>If multiple versions of Python are installed in your environment, you may have |
| to pass additional parameters to CMake so that it can find the right |
| executable, headers and libraries. For example, specifying |
| <code class="docutils literal notranslate"><span class="pre">-DPython3_EXECUTABLE=<path/to/bin/python></span></code> lets CMake choose the |
| Python executable which you are using.</p> |
| <div class="admonition note"> |
| <p class="admonition-title">Note</p> |
| <p>On Linux systems with support for building on multiple architectures, |
| <code class="docutils literal notranslate"><span class="pre">make</span></code> may install libraries in the <code class="docutils literal notranslate"><span class="pre">lib64</span></code> directory by default. For |
| this reason we recommend passing <code class="docutils literal notranslate"><span class="pre">-DCMAKE_INSTALL_LIBDIR=lib</span></code> because the |
| Python build scripts assume the library directory is <code class="docutils literal notranslate"><span class="pre">lib</span></code></p> |
| </div> |
| <div class="admonition note"> |
| <p class="admonition-title">Note</p> |
| <p>If you have conda installed but are not using it to manage dependencies, |
| and you have trouble building the C++ library, you may need to set |
| <code class="docutils literal notranslate"><span class="pre">-DARROW_DEPENDENCY_SOURCE=AUTO</span></code> or some other value (described |
| <a class="reference internal" href="cpp/building.html#cpp-build-dependency-management"><span class="std std-ref">here</span></a>) |
| to explicitly tell CMake not to use conda.</p> |
| </div> |
| <p>For any other C++ build challenges, see <a class="reference internal" href="cpp/index.html#cpp-development"><span class="std std-ref">C++ Development</span></a>.</p> |
| <p>In case you may need to rebuild the C++ part due to errors in the process it is |
| advisable to delete the build folder with command <code class="docutils literal notranslate"><span class="pre">rm</span> <span class="pre">-rf</span> <span class="pre">arrow/cpp/build</span></code>. |
| If the build has passed successfully and you need to rebuild due to latest pull |
| from git main, then this step is not needed.</p> |
| <p>Now, build pyarrow:</p> |
| <div class="highlight-console notranslate"><div class="highlight"><pre><span></span><span class="gp">$ </span><span class="nb">pushd</span><span class="w"> </span>arrow/python |
| <span class="gp">$ </span><span class="nb">export</span><span class="w"> </span><span class="nv">PYARROW_WITH_PARQUET</span><span class="o">=</span><span class="m">1</span> |
| <span class="gp">$ </span><span class="nb">export</span><span class="w"> </span><span class="nv">PYARROW_WITH_DATASET</span><span class="o">=</span><span class="m">1</span> |
| <span class="gp">$ </span><span class="nb">export</span><span class="w"> </span><span class="nv">PYARROW_PARALLEL</span><span class="o">=</span><span class="m">4</span> |
| <span class="gp">$ </span>python<span class="w"> </span>setup.py<span class="w"> </span>build_ext<span class="w"> </span>--inplace |
| <span class="gp">$ </span><span class="nb">popd</span> |
| </pre></div> |
| </div> |
| <p>If you did build one of the optional components (in C++), you need to set the |
| corresponding <code class="docutils literal notranslate"><span class="pre">PYARROW_WITH_$COMPONENT</span></code> environment variable to 1.</p> |
| <p>Similarly, if you built with <code class="docutils literal notranslate"><span class="pre">PARQUET_REQUIRE_ENCRYPTION</span></code> (in C++), you |
| need to set the corresponding <code class="docutils literal notranslate"><span class="pre">PYARROW_WITH_PARQUET_ENCRYPTION</span></code> environment |
| variable to 1.</p> |
| <p>To set the number of threads used to compile PyArrow’s C++/Cython components, |
| set the <code class="docutils literal notranslate"><span class="pre">PYARROW_PARALLEL</span></code> environment variable.</p> |
| <p>If you wish to delete stale PyArrow build artifacts before rebuilding, navigate |
| to the <code class="docutils literal notranslate"><span class="pre">arrow/python</span></code> folder and run <code class="docutils literal notranslate"><span class="pre">git</span> <span class="pre">clean</span> <span class="pre">-Xfd</span> <span class="pre">.</span></code>.</p> |
| <p>Now you are ready to install test dependencies and run <a class="reference internal" href="#unit-testing">Unit Testing</a>, as |
| described above.</p> |
| <p>To build a self-contained wheel (including the Arrow and Parquet C++ |
| libraries), one can set <code class="docutils literal notranslate"><span class="pre">--bundle-arrow-cpp</span></code>:</p> |
| <div class="highlight-console notranslate"><div class="highlight"><pre><span></span><span class="gp">$ </span>pip<span class="w"> </span>install<span class="w"> </span>wheel<span class="w"> </span><span class="c1"># if not installed</span> |
| <span class="gp">$ </span>python<span class="w"> </span>setup.py<span class="w"> </span>build_ext<span class="w"> </span>--build-type<span class="o">=</span><span class="nv">$ARROW_BUILD_TYPE</span><span class="w"> </span><span class="se">\</span> |
| <span class="w"> </span>--bundle-arrow-cpp<span class="w"> </span>bdist_wheel |
| </pre></div> |
| </div> |
| <div class="admonition note"> |
| <p class="admonition-title">Note</p> |
| <p>To install an editable PyArrow build run <code class="docutils literal notranslate"><span class="pre">pip</span> <span class="pre">install</span> <span class="pre">-e</span> <span class="pre">.</span> <span class="pre">--no-build-isolation</span></code> |
| in the <code class="docutils literal notranslate"><span class="pre">arrow/python</span></code> directory.</p> |
| </div> |
| <section id="docker-examples"> |
| <h4>Docker examples<a class="headerlink" href="#docker-examples" title="Permalink to this heading">¶</a></h4> |
| <p>If you are having difficulty building the Python library from source, take a |
| look at the <code class="docutils literal notranslate"><span class="pre">python/examples/minimal_build</span></code> directory which illustrates a |
| complete build and test from source both with the conda- and pip-based build |
| methods.</p> |
| </section> |
| </section> |
| <section id="debugging"> |
| <h3>Debugging<a class="headerlink" href="#debugging" title="Permalink to this heading">¶</a></h3> |
| <p>Since pyarrow depends on the Arrow C++ libraries, debugging can |
| frequently involve crossing between Python and C++ shared libraries.</p> |
| <section id="using-gdb-on-linux"> |
| <h4>Using gdb on Linux<a class="headerlink" href="#using-gdb-on-linux" title="Permalink to this heading">¶</a></h4> |
| <p>To debug the C++ libraries with gdb while running the Python unit |
| tests, first start pytest with gdb:</p> |
| <div class="highlight-console notranslate"><div class="highlight"><pre><span></span><span class="gp">$ </span>gdb<span class="w"> </span>--args<span class="w"> </span>python<span class="w"> </span>-m<span class="w"> </span>pytest<span class="w"> </span>pyarrow/tests/test_to_run.py<span class="w"> </span>-k<span class="w"> </span><span class="nv">$TEST_TO_MATCH</span> |
| </pre></div> |
| </div> |
| <p>To set a breakpoint, use the same gdb syntax that you would when |
| debugging a C++ program, for example:</p> |
| <div class="highlight-console notranslate"><div class="highlight"><pre><span></span><span class="gp gp-VirtualEnv">(gdb)</span> <span class="go">b src/arrow/python/arrow_to_pandas.cc:1874</span> |
| <span class="go">No source file named src/arrow/python/arrow_to_pandas.cc.</span> |
| <span class="go">Make breakpoint pending on future shared library load? (y or [n]) y</span> |
| <span class="go">Breakpoint 1 (src/arrow/python/arrow_to_pandas.cc:1874) pending.</span> |
| </pre></div> |
| </div> |
| <div class="admonition seealso"> |
| <p class="admonition-title">See also</p> |
| <p>The <a class="reference internal" href="../cpp/gdb.html#cpp-gdb-extension"><span class="std std-ref">GDB extension for Arrow C++</span></a>.</p> |
| </div> |
| </section> |
| </section> |
| </section> |
| <section id="building-on-windows"> |
| <span id="build-pyarrow-win"></span><h2>Building on Windows<a class="headerlink" href="#building-on-windows" title="Permalink to this heading">¶</a></h2> |
| <p>Building on Windows requires one of the following compilers to be installed:</p> |
| <ul class="simple"> |
| <li><p><a class="reference external" href="https://download.visualstudio.microsoft.com/download/pr/3e542575-929e-4297-b6c6-bef34d0ee648/639c868e1219c651793aff537a1d3b77/vs_buildtools.exe">Build Tools for Visual Studio 2017</a></p></li> |
| <li><p>Visual Studio 2017</p></li> |
| </ul> |
| <p>During the setup of Build Tools, ensure at least one Windows SDK is selected.</p> |
| <p>We bootstrap a conda environment similar to above, but skipping some of the |
| Linux/macOS-only packages:</p> |
| <p>First, starting from a fresh clone of Apache Arrow:</p> |
| <div class="highlight-console notranslate"><div class="highlight"><pre><span></span><span class="gp">$ </span>git<span class="w"> </span>clone<span class="w"> </span>https://github.com/apache/arrow.git |
| </pre></div> |
| </div> |
| <div class="highlight-console notranslate"><div class="highlight"><pre><span></span><span class="gp">$ </span>conda<span class="w"> </span>create<span class="w"> </span>-y<span class="w"> </span>-n<span class="w"> </span>pyarrow-dev<span class="w"> </span>-c<span class="w"> </span>conda-forge<span class="w"> </span>^ |
| <span class="go"> --file arrow\ci\conda_env_cpp.txt ^</span> |
| <span class="go"> --file arrow\ci\conda_env_python.txt ^</span> |
| <span class="go"> --file arrow\ci\conda_env_gandiva.txt ^</span> |
| <span class="go"> python=3.10</span> |
| <span class="gp">$ </span>conda<span class="w"> </span>activate<span class="w"> </span>pyarrow-dev |
| </pre></div> |
| </div> |
| <p>Now, we build and install Arrow C++ libraries.</p> |
| <p>We set the path of the installation directory of the Arrow C++ libraries as |
| <code class="docutils literal notranslate"><span class="pre">ARROW_HOME</span></code>. When using a conda environment, Arrow C++ is installed |
| in the environment directory, which path is saved in the |
| <a class="reference external" href="https://docs.conda.io/projects/conda-build/en/latest/user-guide/environment-variables.html#environment-variables-that-affect-the-build-process">CONDA_PREFIX</a> |
| environment variable.</p> |
| <div class="highlight-console notranslate"><div class="highlight"><pre><span></span><span class="gp">$ </span><span class="nb">set</span><span class="w"> </span><span class="nv">ARROW_HOME</span><span class="o">=</span>%CONDA_PREFIX%<span class="se">\L</span>ibrary |
| </pre></div> |
| </div> |
| <p>Let’s configure, build and install the Arrow C++ libraries:</p> |
| <div class="highlight-console notranslate"><div class="highlight"><pre><span></span><span class="gp">$ </span>mkdir<span class="w"> </span>arrow<span class="se">\c</span>pp<span class="se">\b</span>uild |
| <span class="gp">$ </span><span class="nb">pushd</span><span class="w"> </span>arrow<span class="se">\c</span>pp<span class="se">\b</span>uild |
| <span class="gp">$ </span>cmake<span class="w"> </span>-G<span class="w"> </span><span class="s2">"Ninja"</span><span class="w"> </span>^ |
| <span class="go"> -DCMAKE_INSTALL_PREFIX=%ARROW_HOME% ^</span> |
| <span class="go"> -DCMAKE_UNITY_BUILD=ON ^</span> |
| <span class="go"> -DARROW_COMPUTE=ON ^</span> |
| <span class="go"> -DARROW_CSV=ON ^</span> |
| <span class="go"> -DARROW_CXXFLAGS="/WX /MP" ^</span> |
| <span class="go"> -DARROW_DATASET=ON ^</span> |
| <span class="go"> -DARROW_FILESYSTEM=ON ^</span> |
| <span class="go"> -DARROW_HDFS=ON ^</span> |
| <span class="go"> -DARROW_JSON=ON ^</span> |
| <span class="go"> -DARROW_PARQUET=ON ^</span> |
| <span class="go"> -DARROW_WITH_LZ4=ON ^</span> |
| <span class="go"> -DARROW_WITH_SNAPPY=ON ^</span> |
| <span class="go"> -DARROW_WITH_ZLIB=ON ^</span> |
| <span class="go"> -DARROW_WITH_ZSTD=ON ^</span> |
| <span class="go"> ..</span> |
| <span class="gp">$ </span>cmake<span class="w"> </span>--build<span class="w"> </span>.<span class="w"> </span>--target<span class="w"> </span>install<span class="w"> </span>--config<span class="w"> </span>Release |
| <span class="gp">$ </span><span class="nb">popd</span> |
| </pre></div> |
| </div> |
| <p>Now, we can build pyarrow:</p> |
| <div class="highlight-console notranslate"><div class="highlight"><pre><span></span><span class="gp">$ </span><span class="nb">pushd</span><span class="w"> </span>arrow<span class="se">\p</span>ython |
| <span class="gp">$ </span><span class="nb">set</span><span class="w"> </span><span class="nv">PYARROW_WITH_PARQUET</span><span class="o">=</span><span class="m">1</span> |
| <span class="gp">$ </span><span class="nb">set</span><span class="w"> </span><span class="nv">CONDA_DLL_SEARCH_MODIFICATION_ENABLE</span><span class="o">=</span><span class="m">1</span> |
| <span class="gp">$ </span>python<span class="w"> </span>setup.py<span class="w"> </span>build_ext<span class="w"> </span>--inplace |
| <span class="gp">$ </span><span class="nb">popd</span> |
| </pre></div> |
| </div> |
| <div class="admonition note"> |
| <p class="admonition-title">Note</p> |
| <p>For building pyarrow, the above defined environment variables need to also |
| be set. Remember this if to want to re-build <code class="docutils literal notranslate"><span class="pre">pyarrow</span></code> after your initial build.</p> |
| </div> |
| <div class="admonition note"> |
| <p class="admonition-title">Note</p> |
| <p>If you are using Conda with Python 3.9 or earlier, you must |
| set <code class="docutils literal notranslate"><span class="pre">CONDA_DLL_SEARCH_MODIFICATION_ENABLE=1</span></code>.</p> |
| </div> |
| <p>Then run the unit tests with:</p> |
| <div class="highlight-console notranslate"><div class="highlight"><pre><span></span><span class="gp">$ </span><span class="nb">pushd</span><span class="w"> </span>arrow<span class="se">\p</span>ython |
| <span class="gp">$ </span>python<span class="w"> </span>-m<span class="w"> </span>pytest<span class="w"> </span>pyarrow |
| <span class="gp">$ </span><span class="nb">popd</span> |
| </pre></div> |
| </div> |
| <div class="admonition note"> |
| <p class="admonition-title">Note</p> |
| <p>With the above instructions the Arrow C++ libraries are not bundled with |
| the Python extension. This is recommended for development as it allows the |
| C++ libraries to be re-built separately.</p> |
| <p>If you are using the conda package manager then conda will ensure the Arrow C++ |
| libraries are found. In case you are <em>not</em> using conda then you have to:</p> |
| <ul class="simple"> |
| <li><p>add the path of installed DLL libraries to <code class="docutils literal notranslate"><span class="pre">PATH</span></code> every time before |
| importing <code class="docutils literal notranslate"><span class="pre">pyarrow</span></code>, or</p></li> |
| <li><p>bundle the Arrow C++ libraries with <code class="docutils literal notranslate"><span class="pre">pyarrow</span></code>.</p></li> |
| </ul> |
| <p>If you want to bundle the Arrow C++ libraries with <code class="docutils literal notranslate"><span class="pre">pyarrow</span></code>, set the |
| <code class="docutils literal notranslate"><span class="pre">PYARROW_BUNDLE_ARROW_CPP</span></code> environment variable before building <code class="docutils literal notranslate"><span class="pre">pyarrow</span></code>:</p> |
| <div class="highlight-console notranslate"><div class="highlight"><pre><span></span><span class="gp">$ </span><span class="nb">set</span><span class="w"> </span><span class="nv">PYARROW_BUNDLE_ARROW_CPP</span><span class="o">=</span><span class="m">1</span> |
| <span class="gp">$ </span>python<span class="w"> </span>setup.py<span class="w"> </span>build_ext<span class="w"> </span>--inplace |
| </pre></div> |
| </div> |
| <p>Note that bundled Arrow C++ libraries will not be automatically |
| updated when rebuilding Arrow C++.</p> |
| </div> |
| <section id="caveats"> |
| <h3>Caveats<a class="headerlink" href="#caveats" title="Permalink to this heading">¶</a></h3> |
| </section> |
| </section> |
| <section id="relevant-components-and-environment-variables"> |
| <h2>Relevant components and environment variables<a class="headerlink" href="#relevant-components-and-environment-variables" title="Permalink to this heading">¶</a></h2> |
| <p>List of relevant Arrow CMake flags and corresponding environment variables |
| to be used when building PyArrow are:</p> |
| <table class="table"> |
| <colgroup> |
| <col style="width: 50.0%" /> |
| <col style="width: 50.0%" /> |
| </colgroup> |
| <thead> |
| <tr class="row-odd"><th class="head"><p>Arrow flags/options</p></th> |
| <th class="head"><p>Corresponding environment variables for PyArrow</p></th> |
| </tr> |
| </thead> |
| <tbody> |
| <tr class="row-even"><td><p><code class="docutils literal notranslate"><span class="pre">CMAKE_BUILD_TYPE</span></code></p></td> |
| <td><p><code class="docutils literal notranslate"><span class="pre">PYARROW_BUILD_TYPE</span></code> (release, debug or relwithdebinfo)</p></td> |
| </tr> |
| <tr class="row-odd"><td><p><code class="docutils literal notranslate"><span class="pre">ARROW_GCS</span></code></p></td> |
| <td><p><code class="docutils literal notranslate"><span class="pre">PYARROW_WITH_GCS</span></code></p></td> |
| </tr> |
| <tr class="row-even"><td><p><code class="docutils literal notranslate"><span class="pre">ARROW_S3</span></code></p></td> |
| <td><p><code class="docutils literal notranslate"><span class="pre">PYARROW_WITH_S3</span></code></p></td> |
| </tr> |
| <tr class="row-odd"><td><p><code class="docutils literal notranslate"><span class="pre">ARROW_HDFS</span></code></p></td> |
| <td><p><code class="docutils literal notranslate"><span class="pre">PYARROW_WITH_HDFS</span></code></p></td> |
| </tr> |
| <tr class="row-even"><td><p><code class="docutils literal notranslate"><span class="pre">ARROW_CUDA</span></code></p></td> |
| <td><p><code class="docutils literal notranslate"><span class="pre">PYARROW_WITH_CUDA</span></code></p></td> |
| </tr> |
| <tr class="row-odd"><td><p><code class="docutils literal notranslate"><span class="pre">ARROW_SUBSTRAIT</span></code></p></td> |
| <td><p><code class="docutils literal notranslate"><span class="pre">PYARROW_WITH_SUBSTRAIT</span></code></p></td> |
| </tr> |
| <tr class="row-even"><td><p><code class="docutils literal notranslate"><span class="pre">ARROW_FLIGHT</span></code></p></td> |
| <td><p><code class="docutils literal notranslate"><span class="pre">PYARROW_WITH_FLIGHT</span></code></p></td> |
| </tr> |
| <tr class="row-odd"><td><p><code class="docutils literal notranslate"><span class="pre">ARROW_DATASET</span></code></p></td> |
| <td><p><code class="docutils literal notranslate"><span class="pre">PYARROW_WITH_DATASET</span></code></p></td> |
| </tr> |
| <tr class="row-even"><td><p><code class="docutils literal notranslate"><span class="pre">ARROW_PARQUET</span></code></p></td> |
| <td><p><code class="docutils literal notranslate"><span class="pre">PYARROW_WITH_PARQUET</span></code></p></td> |
| </tr> |
| <tr class="row-odd"><td><p><code class="docutils literal notranslate"><span class="pre">PARQUET_REQUIRE_ENCRYPTION</span></code></p></td> |
| <td><p><code class="docutils literal notranslate"><span class="pre">PYARROW_WITH_PARQUET_ENCRYPTION</span></code></p></td> |
| </tr> |
| <tr class="row-even"><td><p><code class="docutils literal notranslate"><span class="pre">ARROW_TENSORFLOW</span></code></p></td> |
| <td><p><code class="docutils literal notranslate"><span class="pre">PYARROW_WITH_TENSORFLOW</span></code></p></td> |
| </tr> |
| <tr class="row-odd"><td><p><code class="docutils literal notranslate"><span class="pre">ARROW_ORC</span></code></p></td> |
| <td><p><code class="docutils literal notranslate"><span class="pre">PYARROW_WITH_ORC</span></code></p></td> |
| </tr> |
| <tr class="row-even"><td><p><code class="docutils literal notranslate"><span class="pre">ARROW_GANDIVA</span></code></p></td> |
| <td><p><code class="docutils literal notranslate"><span class="pre">PYARROW_WITH_GANDIVA</span></code></p></td> |
| </tr> |
| </tbody> |
| </table> |
| <p>List of relevant environment variables that can also be used to build |
| PyArrow are:</p> |
| <table class="table"> |
| <colgroup> |
| <col style="width: 33.3%" /> |
| <col style="width: 33.3%" /> |
| <col style="width: 33.3%" /> |
| </colgroup> |
| <thead> |
| <tr class="row-odd"><th class="head"><p>PyArrow environment variable</p></th> |
| <th class="head"><p>Description</p></th> |
| <th class="head"><p>Default value</p></th> |
| </tr> |
| </thead> |
| <tbody> |
| <tr class="row-even"><td><p><code class="docutils literal notranslate"><span class="pre">PYARROW_CMAKE_GENERATOR</span></code></p></td> |
| <td><p>Example: <code class="docutils literal notranslate"><span class="pre">'Visual</span> <span class="pre">Studio</span> <span class="pre">15</span> <span class="pre">2017</span> <span class="pre">Win64'</span></code></p></td> |
| <td><p><code class="docutils literal notranslate"><span class="pre">''</span></code></p></td> |
| </tr> |
| <tr class="row-odd"><td><p><code class="docutils literal notranslate"><span class="pre">PYARROW_CMAKE_OPTIONS</span></code></p></td> |
| <td><p>Extra CMake and Arrow options (ex. <code class="docutils literal notranslate"><span class="pre">"-DARROW_SIMD_LEVEL=NONE</span> <span class="pre">-DCMAKE_OSX_ARCHITECTURES=x86_64;arm64"</span></code>)</p></td> |
| <td><p><code class="docutils literal notranslate"><span class="pre">''</span></code></p></td> |
| </tr> |
| <tr class="row-even"><td><p><code class="docutils literal notranslate"><span class="pre">PYARROW_CXXFLAGS</span></code></p></td> |
| <td><p>Extra C++ compiler flags</p></td> |
| <td><p><code class="docutils literal notranslate"><span class="pre">''</span></code></p></td> |
| </tr> |
| <tr class="row-odd"><td><p><code class="docutils literal notranslate"><span class="pre">PYARROW_GENERATE_COVERAGE</span></code></p></td> |
| <td><p>Setting <code class="docutils literal notranslate"><span class="pre">Xlinetrace</span></code> flag to true for the Cython compiler</p></td> |
| <td><p><code class="docutils literal notranslate"><span class="pre">false</span></code></p></td> |
| </tr> |
| <tr class="row-even"><td><p><code class="docutils literal notranslate"><span class="pre">PYARROW_BUNDLE_ARROW_CPP</span></code></p></td> |
| <td><p>Bundle the Arrow C++ libraries</p></td> |
| <td><p><code class="docutils literal notranslate"><span class="pre">0</span></code> (<code class="docutils literal notranslate"><span class="pre">OFF</span></code>)</p></td> |
| </tr> |
| <tr class="row-odd"><td><p><code class="docutils literal notranslate"><span class="pre">PYARROW_BUNDLE_CYTHON_CPP</span></code></p></td> |
| <td><p>Bundle the C++ files generated by Cython</p></td> |
| <td><p><code class="docutils literal notranslate"><span class="pre">0</span></code> (<code class="docutils literal notranslate"><span class="pre">OFF</span></code>)</p></td> |
| </tr> |
| <tr class="row-even"><td><p><code class="docutils literal notranslate"><span class="pre">PYARROW_INSTALL_TESTS</span></code></p></td> |
| <td><p>Add the test to the python package</p></td> |
| <td><p><code class="docutils literal notranslate"><span class="pre">1</span></code> (<code class="docutils literal notranslate"><span class="pre">ON</span></code>)</p></td> |
| </tr> |
| <tr class="row-odd"><td><p><code class="docutils literal notranslate"><span class="pre">PYARROW_BUILD_VERBOSE</span></code></p></td> |
| <td><p>Enable verbose output from Makefile builds</p></td> |
| <td><p><code class="docutils literal notranslate"><span class="pre">0</span></code> (<code class="docutils literal notranslate"><span class="pre">OFF</span></code>)</p></td> |
| </tr> |
| <tr class="row-even"><td><p><code class="docutils literal notranslate"><span class="pre">PYARROW_PARALLEL</span></code></p></td> |
| <td><p>Number of processes used to compile PyArrow’s C++/Cython components</p></td> |
| <td><p><code class="docutils literal notranslate"><span class="pre">''</span></code></p></td> |
| </tr> |
| </tbody> |
| </table> |
| </section> |
| <section id="deleting-stale-build-artifacts"> |
| <h2>Deleting stale build artifacts<a class="headerlink" href="#deleting-stale-build-artifacts" title="Permalink to this heading">¶</a></h2> |
| <p>When there have been changes to the structure of the Arrow C++ library or PyArrow, |
| a thorough cleaning is recommended as a first attempt to fixing build errors.</p> |
| <div class="admonition note"> |
| <p class="admonition-title">Note</p> |
| <p>It is not necessarily intuitive from the error itself that the problem is due to stale artifacts. |
| Example of a build error from stale artifacts is “Unknown CMake command “arrow_keep_backward_compatibility””.</p> |
| </div> |
| <p>To delete stale Arrow C++ build artifacts:</p> |
| <div class="highlight-console notranslate"><div class="highlight"><pre><span></span><span class="gp">$ </span>rm<span class="w"> </span>-rf<span class="w"> </span>arrow/cpp/build |
| </pre></div> |
| </div> |
| <p>To delete stale PyArrow build artifacts:</p> |
| <div class="highlight-console notranslate"><div class="highlight"><pre><span></span><span class="gp">$ </span>git<span class="w"> </span>clean<span class="w"> </span>-Xfd<span class="w"> </span>python |
| </pre></div> |
| </div> |
| <p>If using a Conda environment, there are some build artifacts that get installed in |
| <code class="docutils literal notranslate"><span class="pre">$ARROW_HOME</span></code> (aka <code class="docutils literal notranslate"><span class="pre">$CONDA_PREFIX</span></code>). For example, <code class="docutils literal notranslate"><span class="pre">$ARROW_HOME/lib/cmake/Arrow*</span></code>, |
| <code class="docutils literal notranslate"><span class="pre">$ARROW_HOME/include/arrow</span></code>, <code class="docutils literal notranslate"><span class="pre">$ARROW_HOME/lib/libarrow*</span></code>, etc.</p> |
| <p>These files can be manually deleted. If unsure which files to erase, one approach |
| is to recreate the Conda environment.</p> |
| <p>Either delete the current one, and start fresh:</p> |
| <div class="highlight-console notranslate"><div class="highlight"><pre><span></span><span class="gp">$ </span>conda<span class="w"> </span>deactivate |
| <span class="gp">$ </span>conda<span class="w"> </span>remove<span class="w"> </span>-n<span class="w"> </span>pyarrow-dev |
| </pre></div> |
| </div> |
| <p>Or, less destructively, create a different environment with a different name.</p> |
| </section> |
| <section id="installing-nightly-packages"> |
| <h2>Installing Nightly Packages<a class="headerlink" href="#installing-nightly-packages" title="Permalink to this heading">¶</a></h2> |
| <div class="admonition warning"> |
| <p class="admonition-title">Warning</p> |
| <p>These packages are not official releases. Use them at your own risk.</p> |
| </div> |
| <p>PyArrow has nightly wheels and Conda packages for testing purposes.</p> |
| <p>These may be suitable for downstream libraries in their continuous integration |
| setup to maintain compatibility with the upcoming PyArrow features, |
| deprecations and/or feature removals.</p> |
| <p>Install the development version of PyArrow from <a class="reference external" href="https://anaconda.org/arrow-nightlies/pyarrow">arrow-nightlies</a> conda channel:</p> |
| <div class="highlight-bash notranslate"><div class="highlight"><pre><span></span>conda<span class="w"> </span>install<span class="w"> </span>-c<span class="w"> </span>arrow-nightlies<span class="w"> </span>pyarrow |
| </pre></div> |
| </div> |
| <p>Install the development version from an <a class="reference external" href="https://gemfury.com/arrow-nightlies">alternative PyPI</a> index:</p> |
| <div class="highlight-bash notranslate"><div class="highlight"><pre><span></span>pip<span class="w"> </span>install<span class="w"> </span>--extra-index-url<span class="w"> </span>https://pypi.fury.io/arrow-nightlies/<span class="w"> </span><span class="se">\</span> |
| <span class="w"> </span>--prefer-binary<span class="w"> </span>--pre<span class="w"> </span>pyarrow |
| </pre></div> |
| </div> |
| </section> |
| </section> |
| |
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