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<!DOCTYPE html>
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<div class="section" id="torch-utils-ffi">
<h1>torch.utils.ffi<a class="headerlink" href="#torch-utils-ffi" title="Permalink to this headline">¶</a></h1>
<dl class="function">
<dt id="torch.utils.ffi.create_extension">
<code class="descclassname">torch.utils.ffi.</code><code class="descname">create_extension</code><span class="sig-paren">(</span><em>name</em>, <em>headers</em>, <em>sources</em>, <em>verbose=True</em>, <em>with_cuda=False</em>, <em>package=False</em>, <em>relative_to=’.’</em>, <em>**kwargs</em><span class="sig-paren">)</span><a class="reference internal" href="_modules/torch/utils/ffi.html#create_extension"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#torch.utils.ffi.create_extension" title="Permalink to this definition">¶</a></dt>
<dd><p>Creates and configures a cffi.FFI object, that builds PyTorch extension.</p>
<table class="docutils field-list" frame="void" rules="none">
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<col class="field-body" />
<tbody valign="top">
<tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first last simple">
<li><strong>name</strong> (<a class="reference external" href="https://docs.python.org/2/library/functions.html#str" title="(in Python v2.7)"><em>str</em></a>) – package name. Can be a nested module e.g. <code class="docutils literal"><span class="pre">.ext.my_lib</span></code>.</li>
<li><strong>headers</strong> (<a class="reference external" href="https://docs.python.org/2/library/functions.html#str" title="(in Python v2.7)"><em>str</em></a><em> or </em><em>List</em><em>[</em><a class="reference external" href="https://docs.python.org/2/library/functions.html#str" title="(in Python v2.7)"><em>str</em></a><em>]</em>) – list of headers, that contain only exported
functions</li>
<li><strong>sources</strong> (<em>List</em><em>[</em><a class="reference external" href="https://docs.python.org/2/library/functions.html#str" title="(in Python v2.7)"><em>str</em></a><em>]</em>) – list of sources to compile.</li>
<li><strong>verbose</strong> (<a class="reference external" href="https://docs.python.org/2/library/functions.html#bool" title="(in Python v2.7)"><em>bool</em></a><em>, </em><em>optional</em>) – if set to <code class="docutils literal"><span class="pre">False</span></code>, no output will be printed
(default: True).</li>
<li><strong>with_cuda</strong> (<a class="reference external" href="https://docs.python.org/2/library/functions.html#bool" title="(in Python v2.7)"><em>bool</em></a><em>, </em><em>optional</em>) – set to <code class="docutils literal"><span class="pre">True</span></code> to compile with CUDA headers
(default: False)</li>
<li><strong>package</strong> (<a class="reference external" href="https://docs.python.org/2/library/functions.html#bool" title="(in Python v2.7)"><em>bool</em></a><em>, </em><em>optional</em>) – set to <code class="docutils literal"><span class="pre">True</span></code> to build in package mode (for modules
meant to be installed as pip packages) (default: False).</li>
<li><strong>relative_to</strong> (<a class="reference external" href="https://docs.python.org/2/library/functions.html#str" title="(in Python v2.7)"><em>str</em></a><em>, </em><em>optional</em>) – path of the build file. Required when
<code class="docutils literal"><span class="pre">package</span> <span class="pre">is</span> <span class="pre">True</span></code>. It’s best to use <code class="docutils literal"><span class="pre">__file__</span></code> for this argument.</li>
<li><strong>kwargs</strong> – additional arguments that are passed to ffi to declare the
extension. See <a class="reference external" href="https://docs.python.org/3/distutils/apiref.html#distutils.core.Extension">Extension API reference</a> for details.</li>
</ul>
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