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<div class="section" id="torch-flatten">
<h1>torch.flatten<a class="headerlink" href="#torch-flatten" title="Permalink to this headline">¶</a></h1>
<dl class="function">
<dt id="torch.flatten">
<code class="sig-prename descclassname">torch.</code><code class="sig-name descname">flatten</code><span class="sig-paren">(</span><em class="sig-param">input</em>, <em class="sig-param">start_dim=0</em>, <em class="sig-param">end_dim=-1</em><span class="sig-paren">)</span> → Tensor<a class="headerlink" href="#torch.flatten" title="Permalink to this definition">¶</a></dt>
<dd><p>Flattens a contiguous range of dims in a tensor.</p>
<dl class="field-list simple">
<dt class="field-odd">Parameters</dt>
<dd class="field-odd"><ul class="simple">
<li><p><strong>input</strong> (<a class="reference internal" href="../tensors.html#torch.Tensor" title="torch.Tensor"><em>Tensor</em></a>) – the input tensor.</p></li>
<li><p><strong>start_dim</strong> (<a class="reference external" href="https://docs.python.org/3/library/functions.html#int" title="(in Python v3.8)"><em>int</em></a>) – the first dim to flatten</p></li>
<li><p><strong>end_dim</strong> (<a class="reference external" href="https://docs.python.org/3/library/functions.html#int" title="(in Python v3.8)"><em>int</em></a>) – the last dim to flatten</p></li>
</ul>
</dd>
</dl>
<p>Example:</p>
<div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="gp">>>> </span><span class="n">t</span> <span class="o">=</span> <span class="n">torch</span><span class="o">.</span><span class="n">tensor</span><span class="p">([[[</span><span class="mi">1</span><span class="p">,</span> <span class="mi">2</span><span class="p">],</span>
<span class="go"> [3, 4]],</span>
<span class="go"> [[5, 6],</span>
<span class="go"> [7, 8]]])</span>
<span class="gp">>>> </span><span class="n">torch</span><span class="o">.</span><span class="n">flatten</span><span class="p">(</span><span class="n">t</span><span class="p">)</span>
<span class="go">tensor([1, 2, 3, 4, 5, 6, 7, 8])</span>
<span class="gp">>>> </span><span class="n">torch</span><span class="o">.</span><span class="n">flatten</span><span class="p">(</span><span class="n">t</span><span class="p">,</span> <span class="n">start_dim</span><span class="o">=</span><span class="mi">1</span><span class="p">)</span>
<span class="go">tensor([[1, 2, 3, 4],</span>
<span class="go"> [5, 6, 7, 8]])</span>
</pre></div>
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