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View code on Github</a>
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<div class='section' id='section-0'>
<div class='docs doc-strings'>
<div class='section-link'>
<a href='#section-0'>#</a>
</div>
<h1>在 Cora 数据集上训练图注意力网络 (GAT)</h1>
</div>
<div class='code'>
<div class="highlight"><pre><span class="lineno">11</span><span></span><span class="kn">from</span> <span class="nn">typing</span> <span class="kn">import</span> <span class="n">Dict</span>
<span class="lineno">12</span>
<span class="lineno">13</span><span class="kn">import</span> <span class="nn">numpy</span> <span class="k">as</span> <span class="nn">np</span>
<span class="lineno">14</span><span class="kn">import</span> <span class="nn">torch</span>
<span class="lineno">15</span><span class="kn">from</span> <span class="nn">torch</span> <span class="kn">import</span> <span class="n">nn</span>
<span class="lineno">16</span>
<span class="lineno">17</span><span class="kn">from</span> <span class="nn">labml</span> <span class="kn">import</span> <span class="n">lab</span><span class="p">,</span> <span class="n">monit</span><span class="p">,</span> <span class="n">tracker</span><span class="p">,</span> <span class="n">experiment</span>
<span class="lineno">18</span><span class="kn">from</span> <span class="nn">labml.configs</span> <span class="kn">import</span> <span class="n">BaseConfigs</span><span class="p">,</span> <span class="n">option</span><span class="p">,</span> <span class="n">calculate</span>
<span class="lineno">19</span><span class="kn">from</span> <span class="nn">labml.utils</span> <span class="kn">import</span> <span class="n">download</span>
<span class="lineno">20</span><span class="kn">from</span> <span class="nn">labml_helpers.device</span> <span class="kn">import</span> <span class="n">DeviceConfigs</span>
<span class="lineno">21</span><span class="kn">from</span> <span class="nn">labml_helpers.module</span> <span class="kn">import</span> <span class="n">Module</span>
<span class="lineno">22</span><span class="kn">from</span> <span class="nn">labml_nn.graphs.gat</span> <span class="kn">import</span> <span class="n">GraphAttentionLayer</span>
<span class="lineno">23</span><span class="kn">from</span> <span class="nn">labml_nn.optimizers.configs</span> <span class="kn">import</span> <span class="n">OptimizerConfigs</span></pre></div>
</div>
</div>
<div class='section' id='section-1'>
<div class='docs doc-strings'>
<div class='section-link'>
<a href='#section-1'>#</a>
</div>
<h2><a href="https://linqs.soe.ucsc.edu/data">Cora 数据集</a></h2>
<p>Cora 数据集是研究论文的数据集。对于每篇论文，我们都得到一个二进制特征向量，该向量表示单词的存在。每篇论文分为 7 个类别之一。该数据集还具有引文网络。</p>
<p>论文是图的节点，边缘是引文。</p>
<p>任务是使用特征向量和引文网络作为输入，将节点分类为 7 类。</p>
</div>
<div class='code'>
<div class="highlight"><pre><span class="lineno">26</span><span class="k">class</span> <span class="nc">CoraDataset</span><span class="p">:</span></pre></div>
</div>
</div>
<div class='section' id='section-2'>
<div class='docs'>
<div class='section-link'>
<a href='#section-2'>#</a>
</div>
<p>每个节点的标签</p>
</div>
<div class='code'>
<div class="highlight"><pre><span class="lineno">41</span> <span class="n">labels</span><span class="p">:</span> <span class="n">torch</span><span class="o">.</span><span class="n">Tensor</span></pre></div>
</div>
</div>
<div class='section' id='section-3'>
<div class='docs'>
<div class='section-link'>
<a href='#section-3'>#</a>
</div>
<p>一组类名和一个唯一的整数索引</p>
</div>
<div class='code'>
<div class="highlight"><pre><span class="lineno">43</span> <span class="n">classes</span><span class="p">:</span> <span class="n">Dict</span><span class="p">[</span><span class="nb">str</span><span class="p">,</span> <span class="nb">int</span><span class="p">]</span></pre></div>
</div>
</div>
<div class='section' id='section-4'>
<div class='docs'>
<div class='section-link'>
<a href='#section-4'>#</a>
</div>
<p>所有节点的特征向量</p>
</div>
<div class='code'>
<div class="highlight"><pre><span class="lineno">45</span> <span class="n">features</span><span class="p">:</span> <span class="n">torch</span><span class="o">.</span><span class="n">Tensor</span></pre></div>
</div>
</div>
<div class='section' id='section-5'>
<div class='docs'>
<div class='section-link'>
<a href='#section-5'>#</a>
</div>
<p>包含边信息的邻接矩阵。<code class="highlight"><span></span><span class="n">adj_mat</span><span class="p">[</span><span class="n">i</span><span class="p">][</span><span class="n">j</span><span class="p">]</span></code>
<code class="highlight"><span></span><span class="kc">True</span></code>
如果存在从<code class="highlight"><span></span><span class="n">i</span></code>
到的边缘<code class="highlight"><span></span><span class="n">j</span></code>
。</p>
</div>
<div class='code'>
<div class="highlight"><pre><span class="lineno">48</span> <span class="n">adj_mat</span><span class="p">:</span> <span class="n">torch</span><span class="o">.</span><span class="n">Tensor</span></pre></div>
</div>
</div>
<div class='section' id='section-6'>
<div class='docs doc-strings'>
<div class='section-link'>
<a href='#section-6'>#</a>
</div>
<p>下载数据集</p>
</div>
<div class='code'>
<div class="highlight"><pre><span class="lineno">50</span> <span class="nd">@staticmethod</span>
<span class="lineno">51</span> <span class="k">def</span> <span class="nf">_download</span><span class="p">():</span></pre></div>
</div>
</div>
<div class='section' id='section-7'>
<div class='docs'>
<div class='section-link'>
<a href='#section-7'>#</a>
</div>
</div>
<div class='code'>
<div class="highlight"><pre><span class="lineno">55</span> <span class="k">if</span> <span class="ow">not</span> <span class="p">(</span><span class="n">lab</span><span class="o">.</span><span class="n">get_data_path</span><span class="p">()</span> <span class="o">/</span> <span class="s1">&#39;cora&#39;</span><span class="p">)</span><span class="o">.</span><span class="n">exists</span><span class="p">():</span>
<span class="lineno">56</span> <span class="n">download</span><span class="o">.</span><span class="n">download_file</span><span class="p">(</span><span class="s1">&#39;https://linqs-data.soe.ucsc.edu/public/lbc/cora.tgz&#39;</span><span class="p">,</span>
<span class="lineno">57</span> <span class="n">lab</span><span class="o">.</span><span class="n">get_data_path</span><span class="p">()</span> <span class="o">/</span> <span class="s1">&#39;cora.tgz&#39;</span><span class="p">)</span>
<span class="lineno">58</span> <span class="n">download</span><span class="o">.</span><span class="n">extract_tar</span><span class="p">(</span><span class="n">lab</span><span class="o">.</span><span class="n">get_data_path</span><span class="p">()</span> <span class="o">/</span> <span class="s1">&#39;cora.tgz&#39;</span><span class="p">,</span> <span class="n">lab</span><span class="o">.</span><span class="n">get_data_path</span><span class="p">())</span></pre></div>
</div>
</div>
<div class='section' id='section-8'>
<div class='docs doc-strings'>
<div class='section-link'>
<a href='#section-8'>#</a>
</div>
<p>加载数据集</p>
</div>
<div class='code'>
<div class="highlight"><pre><span class="lineno">60</span> <span class="k">def</span> <span class="fm">__init__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">include_edges</span><span class="p">:</span> <span class="nb">bool</span> <span class="o">=</span> <span class="kc">True</span><span class="p">):</span></pre></div>
</div>
</div>
<div class='section' id='section-9'>
<div class='docs'>
<div class='section-link'>
<a href='#section-9'>#</a>
</div>
<p>是否包括边缘。这是测试如果我们忽略引文网络会损失多少准确性。</p>
</div>
<div class='code'>
<div class="highlight"><pre><span class="lineno">67</span> <span class="bp">self</span><span class="o">.</span><span class="n">include_edges</span> <span class="o">=</span> <span class="n">include_edges</span></pre></div>
</div>
</div>
<div class='section' id='section-10'>
<div class='docs'>
<div class='section-link'>
<a href='#section-10'>#</a>
</div>
<p>下载数据集</p>
</div>
<div class='code'>
<div class="highlight"><pre><span class="lineno">70</span> <span class="bp">self</span><span class="o">.</span><span class="n">_download</span><span class="p">()</span></pre></div>
</div>
</div>
<div class='section' id='section-11'>
<div class='docs'>
<div class='section-link'>
<a href='#section-11'>#</a>
</div>
<p>阅读纸张 ID、特征矢量和标签</p>
</div>
<div class='code'>
<div class="highlight"><pre><span class="lineno">73</span> <span class="k">with</span> <span class="n">monit</span><span class="o">.</span><span class="n">section</span><span class="p">(</span><span class="s1">&#39;Read content file&#39;</span><span class="p">):</span>
<span class="lineno">74</span> <span class="n">content</span> <span class="o">=</span> <span class="n">np</span><span class="o">.</span><span class="n">genfromtxt</span><span class="p">(</span><span class="nb">str</span><span class="p">(</span><span class="n">lab</span><span class="o">.</span><span class="n">get_data_path</span><span class="p">()</span> <span class="o">/</span> <span class="s1">&#39;cora/cora.content&#39;</span><span class="p">),</span> <span class="n">dtype</span><span class="o">=</span><span class="n">np</span><span class="o">.</span><span class="n">dtype</span><span class="p">(</span><span class="nb">str</span><span class="p">))</span></pre></div>
</div>
</div>
<div class='section' id='section-12'>
<div class='docs'>
<div class='section-link'>
<a href='#section-12'>#</a>
</div>
<p>加载引文，这是一个整数对的列表。</p>
</div>
<div class='code'>
<div class="highlight"><pre><span class="lineno">76</span> <span class="k">with</span> <span class="n">monit</span><span class="o">.</span><span class="n">section</span><span class="p">(</span><span class="s1">&#39;Read citations file&#39;</span><span class="p">):</span>
<span class="lineno">77</span> <span class="n">citations</span> <span class="o">=</span> <span class="n">np</span><span class="o">.</span><span class="n">genfromtxt</span><span class="p">(</span><span class="nb">str</span><span class="p">(</span><span class="n">lab</span><span class="o">.</span><span class="n">get_data_path</span><span class="p">()</span> <span class="o">/</span> <span class="s1">&#39;cora/cora.cites&#39;</span><span class="p">),</span> <span class="n">dtype</span><span class="o">=</span><span class="n">np</span><span class="o">.</span><span class="n">int32</span><span class="p">)</span></pre></div>
</div>
</div>
<div class='section' id='section-13'>
<div class='docs'>
<div class='section-link'>
<a href='#section-13'>#</a>
</div>
<p>获取特征向量</p>
</div>
<div class='code'>
<div class="highlight"><pre><span class="lineno">80</span> <span class="n">features</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="n">np</span><span class="o">.</span><span class="n">array</span><span class="p">(</span><span class="n">content</span><span class="p">[:,</span> <span class="mi">1</span><span class="p">:</span><span class="o">-</span><span class="mi">1</span><span class="p">],</span> <span class="n">dtype</span><span class="o">=</span><span class="n">np</span><span class="o">.</span><span class="n">float32</span><span class="p">))</span></pre></div>
</div>
</div>
<div class='section' id='section-14'>
<div class='docs'>
<div class='section-link'>
<a href='#section-14'>#</a>
</div>
<p>归一化特征向量</p>
</div>
<div class='code'>
<div class="highlight"><pre><span class="lineno">82</span> <span class="bp">self</span><span class="o">.</span><span class="n">features</span> <span class="o">=</span> <span class="n">features</span> <span class="o">/</span> <span class="n">features</span><span class="o">.</span><span class="n">sum</span><span class="p">(</span><span class="n">dim</span><span class="o">=</span><span class="mi">1</span><span class="p">,</span> <span class="n">keepdim</span><span class="o">=</span><span class="kc">True</span><span class="p">)</span></pre></div>
</div>
</div>
<div class='section' id='section-15'>
<div class='docs'>
<div class='section-link'>
<a href='#section-15'>#</a>
</div>
<p>获取类名并为每个类分配一个唯一的整数</p>
</div>
<div class='code'>
<div class="highlight"><pre><span class="lineno">85</span> <span class="bp">self</span><span class="o">.</span><span class="n">classes</span> <span class="o">=</span> <span class="p">{</span><span class="n">s</span><span class="p">:</span> <span class="n">i</span> <span class="k">for</span> <span class="n">i</span><span class="p">,</span> <span class="n">s</span> <span class="ow">in</span> <span class="nb">enumerate</span><span class="p">(</span><span class="nb">set</span><span class="p">(</span><span class="n">content</span><span class="p">[:,</span> <span class="o">-</span><span class="mi">1</span><span class="p">]))}</span></pre></div>
</div>
</div>
<div class='section' id='section-16'>
<div class='docs'>
<div class='section-link'>
<a href='#section-16'>#</a>
</div>
<p>获取这些整数的标签</p>
</div>
<div class='code'>
<div class="highlight"><pre><span class="lineno">87</span> <span class="bp">self</span><span class="o">.</span><span class="n">labels</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="bp">self</span><span class="o">.</span><span class="n">classes</span><span class="p">[</span><span class="n">i</span><span class="p">]</span> <span class="k">for</span> <span class="n">i</span> <span class="ow">in</span> <span class="n">content</span><span class="p">[:,</span> <span class="o">-</span><span class="mi">1</span><span class="p">]],</span> <span class="n">dtype</span><span class="o">=</span><span class="n">torch</span><span class="o">.</span><span class="n">long</span><span class="p">)</span></pre></div>
</div>
</div>
<div class='section' id='section-17'>
<div class='docs'>
<div class='section-link'>
<a href='#section-17'>#</a>
</div>
<p>获取纸质证件</p>
</div>
<div class='code'>
<div class="highlight"><pre><span class="lineno">90</span> <span class="n">paper_ids</span> <span class="o">=</span> <span class="n">np</span><span class="o">.</span><span class="n">array</span><span class="p">(</span><span class="n">content</span><span class="p">[:,</span> <span class="mi">0</span><span class="p">],</span> <span class="n">dtype</span><span class="o">=</span><span class="n">np</span><span class="o">.</span><span class="n">int32</span><span class="p">)</span></pre></div>
</div>
</div>
<div class='section' id='section-18'>
<div class='docs'>
<div class='section-link'>
<a href='#section-18'>#</a>
</div>
<p>纸张 ID 到索引的映射</p>
</div>
<div class='code'>
<div class="highlight"><pre><span class="lineno">92</span> <span class="n">ids_to_idx</span> <span class="o">=</span> <span class="p">{</span><span class="n">id_</span><span class="p">:</span> <span class="n">i</span> <span class="k">for</span> <span class="n">i</span><span class="p">,</span> <span class="n">id_</span> <span class="ow">in</span> <span class="nb">enumerate</span><span class="p">(</span><span class="n">paper_ids</span><span class="p">)}</span></pre></div>
</div>
</div>
<div class='section' id='section-19'>
<div class='docs'>
<div class='section-link'>
<a href='#section-19'>#</a>
</div>
<p>空邻接矩阵-恒等矩阵</p>
</div>
<div class='code'>
<div class="highlight"><pre><span class="lineno">95</span> <span class="bp">self</span><span class="o">.</span><span class="n">adj_mat</span> <span class="o">=</span> <span class="n">torch</span><span class="o">.</span><span class="n">eye</span><span class="p">(</span><span class="nb">len</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">labels</span><span class="p">),</span> <span class="n">dtype</span><span class="o">=</span><span class="n">torch</span><span class="o">.</span><span class="n">bool</span><span class="p">)</span></pre></div>
</div>
</div>
<div class='section' id='section-20'>
<div class='docs'>
<div class='section-link'>
<a href='#section-20'>#</a>
</div>
<p>在邻接矩阵中标记引用</p>
</div>
<div class='code'>
<div class="highlight"><pre><span class="lineno">98</span> <span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">include_edges</span><span class="p">:</span>
<span class="lineno">99</span> <span class="k">for</span> <span class="n">e</span> <span class="ow">in</span> <span class="n">citations</span><span class="p">:</span></pre></div>
</div>
</div>
<div class='section' id='section-21'>
<div class='docs'>
<div class='section-link'>
<a href='#section-21'>#</a>
</div>
<p>一对纸质索引</p>
</div>
<div class='code'>
<div class="highlight"><pre><span class="lineno">101</span> <span class="n">e1</span><span class="p">,</span> <span class="n">e2</span> <span class="o">=</span> <span class="n">ids_to_idx</span><span class="p">[</span><span class="n">e</span><span class="p">[</span><span class="mi">0</span><span class="p">]],</span> <span class="n">ids_to_idx</span><span class="p">[</span><span class="n">e</span><span class="p">[</span><span class="mi">1</span><span class="p">]]</span></pre></div>
</div>
</div>
<div class='section' id='section-22'>
<div class='docs'>
<div class='section-link'>
<a href='#section-22'>#</a>
</div>
<p>我们构建一个对称的图形，如果纸张<span ><span class="katex"><span aria-hidden="true" class="katex-html"><span class="base"><span class="strut" style="height:0.65952em;vertical-align:0em;"></span><span class="mord coloredeq eqa" style=""><span class="mord mathnormal" style="">i</span></span></span></span></span></span>引用了纸张，<span ><span class="katex"><span aria-hidden="true" class="katex-html"><span class="base"><span class="strut" style="height:0.85396em;vertical-align:-0.19444em;"></span><span class="mord coloredeq eqb" style=""><span class="mord mathnormal" style="margin-right:0.05724em">j</span></span></span></span></span></span>我们会在其中放置一个从<span ><span class="katex"><span aria-hidden="true" class="katex-html"><span class="base"><span class="strut" style="height:0.65952em;vertical-align:0em;"></span><span class="mord coloredeq eqa" style=""><span class="mord mathnormal" style="">i</span></span></span></span></span></span>到的徽章<span ><span class="katex"><span aria-hidden="true" class="katex-html"><span class="base"><span class="strut" style="height:0.85396em;vertical-align:-0.19444em;"></span><span class="mord coloredeq eqb" style=""><span class="mord mathnormal" style="margin-right:0.05724em">j</span></span></span></span></span></span>以及从<span ><span class="katex"><span aria-hidden="true" class="katex-html"><span class="base"><span class="strut" style="height:0.85396em;vertical-align:-0.19444em;"></span><span class="mord coloredeq eqb" style=""><span class="mord mathnormal" style="margin-right:0.05724em">j</span></span></span></span></span></span>到<span ><span class="katex"><span aria-hidden="true" class="katex-html"><span class="base"><span class="strut" style="height:0.65952em;vertical-align:0em;"></span><span class="mord coloredeq eqa" style=""><span class="mord mathnormal" style="">i</span></span></span></span></span></span>。</p>
</div>
<div class='code'>
<div class="highlight"><pre><span class="lineno">105</span> <span class="bp">self</span><span class="o">.</span><span class="n">adj_mat</span><span class="p">[</span><span class="n">e1</span><span class="p">][</span><span class="n">e2</span><span class="p">]</span> <span class="o">=</span> <span class="kc">True</span>
<span class="lineno">106</span> <span class="bp">self</span><span class="o">.</span><span class="n">adj_mat</span><span class="p">[</span><span class="n">e2</span><span class="p">][</span><span class="n">e1</span><span class="p">]</span> <span class="o">=</span> <span class="kc">True</span></pre></div>
</div>
</div>
<div class='section' id='section-23'>
<div class='docs doc-strings'>
<div class='section-link'>
<a href='#section-23'>#</a>
</div>
<h2>Graph 注意力网络 (GAT)</h2>
<p>这个图形关注网络有两个<a href="index.html">图形关注层</a>。</p>
</div>
<div class='code'>
<div class="highlight"><pre><span class="lineno">109</span><span class="k">class</span> <span class="nc">GAT</span><span class="p">(</span><span class="n">Module</span><span class="p">):</span></pre></div>
</div>
</div>
<div class='section' id='section-24'>
<div class='docs doc-strings'>
<div class='section-link'>
<a href='#section-24'>#</a>
</div>
<ul><li><code class="highlight"><span></span><span class="n">in_features</span></code>
是每个节点的要素数</li>
<li><code class="highlight"><span></span><span class="n">n_hidden</span></code>
是第一个图形关注层中的要素数</li>
<li><code class="highlight"><span></span><span class="n">n_classes</span></code>
是类的数量</li>
<li><code class="highlight"><span></span><span class="n">n_heads</span></code>
是图表关注层中的头部数量</li>
<li><code class="highlight"><span></span><span class="n">dropout</span></code>
是辍学概率</li></ul>
</div>
<div class='code'>
<div class="highlight"><pre><span class="lineno">116</span> <span class="k">def</span> <span class="fm">__init__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">in_features</span><span class="p">:</span> <span class="nb">int</span><span class="p">,</span> <span class="n">n_hidden</span><span class="p">:</span> <span class="nb">int</span><span class="p">,</span> <span class="n">n_classes</span><span class="p">:</span> <span class="nb">int</span><span class="p">,</span> <span class="n">n_heads</span><span class="p">:</span> <span class="nb">int</span><span class="p">,</span> <span class="n">dropout</span><span class="p">:</span> <span class="nb">float</span><span class="p">):</span></pre></div>
</div>
</div>
<div class='section' id='section-25'>
<div class='docs'>
<div class='section-link'>
<a href='#section-25'>#</a>
</div>
</div>
<div class='code'>
<div class="highlight"><pre><span class="lineno">124</span> <span class="nb">super</span><span class="p">()</span><span class="o">.</span><span class="fm">__init__</span><span class="p">()</span></pre></div>
</div>
</div>
<div class='section' id='section-26'>
<div class='docs'>
<div class='section-link'>
<a href='#section-26'>#</a>
</div>
<p>我们连接头部的第一个图形注意层</p>
</div>
<div class='code'>
<div class="highlight"><pre><span class="lineno">127</span> <span class="bp">self</span><span class="o">.</span><span class="n">layer1</span> <span class="o">=</span> <span class="n">GraphAttentionLayer</span><span class="p">(</span><span class="n">in_features</span><span class="p">,</span> <span class="n">n_hidden</span><span class="p">,</span> <span class="n">n_heads</span><span class="p">,</span> <span class="n">is_concat</span><span class="o">=</span><span class="kc">True</span><span class="p">,</span> <span class="n">dropout</span><span class="o">=</span><span class="n">dropout</span><span class="p">)</span></pre></div>
</div>
</div>
<div class='section' id='section-27'>
<div class='docs'>
<div class='section-link'>
<a href='#section-27'>#</a>
</div>
<p>第一个图形关注层之后的激活功能</p>
</div>
<div class='code'>
<div class="highlight"><pre><span class="lineno">129</span> <span class="bp">self</span><span class="o">.</span><span class="n">activation</span> <span class="o">=</span> <span class="n">nn</span><span class="o">.</span><span class="n">ELU</span><span class="p">()</span></pre></div>
</div>
</div>
<div class='section' id='section-28'>
<div class='docs'>
<div class='section-link'>
<a href='#section-28'>#</a>
</div>
<p>最后一张图关注层，我们平均头部</p>
</div>
<div class='code'>
<div class="highlight"><pre><span class="lineno">131</span> <span class="bp">self</span><span class="o">.</span><span class="n">output</span> <span class="o">=</span> <span class="n">GraphAttentionLayer</span><span class="p">(</span><span class="n">n_hidden</span><span class="p">,</span> <span class="n">n_classes</span><span class="p">,</span> <span class="mi">1</span><span class="p">,</span> <span class="n">is_concat</span><span class="o">=</span><span class="kc">False</span><span class="p">,</span> <span class="n">dropout</span><span class="o">=</span><span class="n">dropout</span><span class="p">)</span></pre></div>
</div>
</div>
<div class='section' id='section-29'>
<div class='docs'>
<div class='section-link'>
<a href='#section-29'>#</a>
</div>
<p>辍学</p>
</div>
<div class='code'>
<div class="highlight"><pre><span class="lineno">133</span> <span class="bp">self</span><span class="o">.</span><span class="n">dropout</span> <span class="o">=</span> <span class="n">nn</span><span class="o">.</span><span class="n">Dropout</span><span class="p">(</span><span class="n">dropout</span><span class="p">)</span></pre></div>
</div>
</div>
<div class='section' id='section-30'>
<div class='docs doc-strings'>
<div class='section-link'>
<a href='#section-30'>#</a>
</div>
<ul><li><code class="highlight"><span></span><span class="n">x</span></code>
是形状的特征向量<code class="highlight"><span></span><span class="p">[</span><span class="n">n_nodes</span><span class="p">,</span> <span class="n">in_features</span><span class="p">]</span></code>
</li>
<li><code class="highlight"><span></span><span class="n">adj_mat</span></code>
是形式的邻接矩阵<code class="highlight"><span></span><span class="p">[</span><span class="n">n_nodes</span><span class="p">,</span> <span class="n">n_nodes</span><span class="p">,</span> <span class="n">n_heads</span><span class="p">]</span></code>
或<code class="highlight"><span></span><span class="p">[</span><span class="n">n_nodes</span><span class="p">,</span> <span class="n">n_nodes</span><span class="p">,</span> <span class="mi">1</span><span class="p">]</span></code>
</li></ul>
</div>
<div class='code'>
<div class="highlight"><pre><span class="lineno">135</span> <span class="k">def</span> <span class="nf">forward</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">x</span><span class="p">:</span> <span class="n">torch</span><span class="o">.</span><span class="n">Tensor</span><span class="p">,</span> <span class="n">adj_mat</span><span class="p">:</span> <span class="n">torch</span><span class="o">.</span><span class="n">Tensor</span><span class="p">):</span></pre></div>
</div>
</div>
<div class='section' id='section-31'>
<div class='docs'>
<div class='section-link'>
<a href='#section-31'>#</a>
</div>
<p>将丢失应用于输入</p>
</div>
<div class='code'>
<div class="highlight"><pre><span class="lineno">142</span> <span class="n">x</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">dropout</span><span class="p">(</span><span class="n">x</span><span class="p">)</span></pre></div>
</div>
</div>
<div class='section' id='section-32'>
<div class='docs'>
<div class='section-link'>
<a href='#section-32'>#</a>
</div>
<p>第一个图形关注层</p>
</div>
<div class='code'>
<div class="highlight"><pre><span class="lineno">144</span> <span class="n">x</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">layer1</span><span class="p">(</span><span class="n">x</span><span class="p">,</span> <span class="n">adj_mat</span><span class="p">)</span></pre></div>
</div>
</div>
<div class='section' id='section-33'>
<div class='docs'>
<div class='section-link'>
<a href='#section-33'>#</a>
</div>
<p>激活功能</p>
</div>
<div class='code'>
<div class="highlight"><pre><span class="lineno">146</span> <span class="n">x</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">activation</span><span class="p">(</span><span class="n">x</span><span class="p">)</span></pre></div>
</div>
</div>
<div class='section' id='section-34'>
<div class='docs'>
<div class='section-link'>
<a href='#section-34'>#</a>
</div>
<p>辍学</p>
</div>
<div class='code'>
<div class="highlight"><pre><span class="lineno">148</span> <span class="n">x</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">dropout</span><span class="p">(</span><span class="n">x</span><span class="p">)</span></pre></div>
</div>
</div>
<div class='section' id='section-35'>
<div class='docs'>
<div class='section-link'>
<a href='#section-35'>#</a>
</div>
<p>logits 的输出层（未激活）</p>
</div>
<div class='code'>
<div class="highlight"><pre><span class="lineno">150</span> <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">output</span><span class="p">(</span><span class="n">x</span><span class="p">,</span> <span class="n">adj_mat</span><span class="p">)</span></pre></div>
</div>
</div>
<div class='section' id='section-36'>
<div class='docs doc-strings'>
<div class='section-link'>
<a href='#section-36'>#</a>
</div>
<p>计算精度的简单函数</p>
</div>
<div class='code'>
<div class="highlight"><pre><span class="lineno">153</span><span class="k">def</span> <span class="nf">accuracy</span><span class="p">(</span><span class="n">output</span><span class="p">:</span> <span class="n">torch</span><span class="o">.</span><span class="n">Tensor</span><span class="p">,</span> <span class="n">labels</span><span class="p">:</span> <span class="n">torch</span><span class="o">.</span><span class="n">Tensor</span><span class="p">):</span></pre></div>
</div>
</div>
<div class='section' id='section-37'>
<div class='docs'>
<div class='section-link'>
<a href='#section-37'>#</a>
</div>
</div>
<div class='code'>
<div class="highlight"><pre><span class="lineno">157</span> <span class="k">return</span> <span class="n">output</span><span class="o">.</span><span class="n">argmax</span><span class="p">(</span><span class="n">dim</span><span class="o">=-</span><span class="mi">1</span><span class="p">)</span><span class="o">.</span><span class="n">eq</span><span class="p">(</span><span class="n">labels</span><span class="p">)</span><span class="o">.</span><span class="n">sum</span><span class="p">()</span><span class="o">.</span><span class="n">item</span><span class="p">()</span> <span class="o">/</span> <span class="nb">len</span><span class="p">(</span><span class="n">labels</span><span class="p">)</span></pre></div>
</div>
</div>
<div class='section' id='section-38'>
<div class='docs doc-strings'>
<div class='section-link'>
<a href='#section-38'>#</a>
</div>
<h2>配置</h2>
</div>
<div class='code'>
<div class="highlight"><pre><span class="lineno">160</span><span class="k">class</span> <span class="nc">Configs</span><span class="p">(</span><span class="n">BaseConfigs</span><span class="p">):</span></pre></div>
</div>
</div>
<div class='section' id='section-39'>
<div class='docs'>
<div class='section-link'>
<a href='#section-39'>#</a>
</div>
<p>型号</p>
</div>
<div class='code'>
<div class="highlight"><pre><span class="lineno">166</span> <span class="n">model</span><span class="p">:</span> <span class="n">GAT</span></pre></div>
</div>
</div>
<div class='section' id='section-40'>
<div class='docs'>
<div class='section-link'>
<a href='#section-40'>#</a>
</div>
<p>要训练的节点数</p>
</div>
<div class='code'>
<div class="highlight"><pre><span class="lineno">168</span> <span class="n">training_samples</span><span class="p">:</span> <span class="nb">int</span> <span class="o">=</span> <span class="mi">500</span></pre></div>
</div>
</div>
<div class='section' id='section-41'>
<div class='docs'>
<div class='section-link'>
<a href='#section-41'>#</a>
</div>
<p>输入中每个节点的要素数</p>
</div>
<div class='code'>
<div class="highlight"><pre><span class="lineno">170</span> <span class="n">in_features</span><span class="p">:</span> <span class="nb">int</span></pre></div>
</div>
</div>
<div class='section' id='section-42'>
<div class='docs'>
<div class='section-link'>
<a href='#section-42'>#</a>
</div>
<p>第一个图形关注图层中的要素数</p>
</div>
<div class='code'>
<div class="highlight"><pre><span class="lineno">172</span> <span class="n">n_hidden</span><span class="p">:</span> <span class="nb">int</span> <span class="o">=</span> <span class="mi">64</span></pre></div>
</div>
</div>
<div class='section' id='section-43'>
<div class='docs'>
<div class='section-link'>
<a href='#section-43'>#</a>
</div>
<p>头数</p>
</div>
<div class='code'>
<div class="highlight"><pre><span class="lineno">174</span> <span class="n">n_heads</span><span class="p">:</span> <span class="nb">int</span> <span class="o">=</span> <span class="mi">8</span></pre></div>
</div>
</div>
<div class='section' id='section-44'>
<div class='docs'>
<div class='section-link'>
<a href='#section-44'>#</a>
</div>
<p>用于分类的类数</p>
</div>
<div class='code'>
<div class="highlight"><pre><span class="lineno">176</span> <span class="n">n_classes</span><span class="p">:</span> <span class="nb">int</span></pre></div>
</div>
</div>
<div class='section' id='section-45'>
<div class='docs'>
<div class='section-link'>
<a href='#section-45'>#</a>
</div>
<p>辍学概率</p>
</div>
<div class='code'>
<div class="highlight"><pre><span class="lineno">178</span> <span class="n">dropout</span><span class="p">:</span> <span class="nb">float</span> <span class="o">=</span> <span class="mf">0.6</span></pre></div>
</div>
</div>
<div class='section' id='section-46'>
<div class='docs'>
<div class='section-link'>
<a href='#section-46'>#</a>
</div>
<p>是否包括引文网络</p>
</div>
<div class='code'>
<div class="highlight"><pre><span class="lineno">180</span> <span class="n">include_edges</span><span class="p">:</span> <span class="nb">bool</span> <span class="o">=</span> <span class="kc">True</span></pre></div>
</div>
</div>
<div class='section' id='section-47'>
<div class='docs'>
<div class='section-link'>
<a href='#section-47'>#</a>
</div>
<p>数据集</p>
</div>
<div class='code'>
<div class="highlight"><pre><span class="lineno">182</span> <span class="n">dataset</span><span class="p">:</span> <span class="n">CoraDataset</span></pre></div>
</div>
</div>
<div class='section' id='section-48'>
<div class='docs'>
<div class='section-link'>
<a href='#section-48'>#</a>
</div>
<p>训练迭代次数</p>
</div>
<div class='code'>
<div class="highlight"><pre><span class="lineno">184</span> <span class="n">epochs</span><span class="p">:</span> <span class="nb">int</span> <span class="o">=</span> <span class="mi">1_000</span></pre></div>
</div>
</div>
<div class='section' id='section-49'>
<div class='docs'>
<div class='section-link'>
<a href='#section-49'>#</a>
</div>
<p>亏损函数</p>
</div>
<div class='code'>
<div class="highlight"><pre><span class="lineno">186</span> <span class="n">loss_func</span> <span class="o">=</span> <span class="n">nn</span><span class="o">.</span><span class="n">CrossEntropyLoss</span><span class="p">()</span></pre></div>
</div>
</div>
<div class='section' id='section-50'>
<div class='docs'>
<div class='section-link'>
<a href='#section-50'>#</a>
</div>
<p>用于训练的设备</p>
<p>这将为设备创建配置，以便我们可以通过传递配置值来更改设备</p>
</div>
<div class='code'>
<div class="highlight"><pre><span class="lineno">191</span> <span class="n">device</span><span class="p">:</span> <span class="n">torch</span><span class="o">.</span><span class="n">device</span> <span class="o">=</span> <span class="n">DeviceConfigs</span><span class="p">()</span></pre></div>
</div>
</div>
<div class='section' id='section-51'>
<div class='docs'>
<div class='section-link'>
<a href='#section-51'>#</a>
</div>
<p>优化器</p>
</div>
<div class='code'>
<div class="highlight"><pre><span class="lineno">193</span> <span class="n">optimizer</span><span class="p">:</span> <span class="n">torch</span><span class="o">.</span><span class="n">optim</span><span class="o">.</span><span class="n">Adam</span></pre></div>
</div>
</div>
<div class='section' id='section-52'>
<div class='docs doc-strings'>
<div class='section-link'>
<a href='#section-52'>#</a>
</div>
<h3>训练循环</h3>
<p>由于数据集很小，我们进行全批量训练。如果要进行采样和训练，我们将不得不为每个训练步骤对一组节点以及跨越这些选定节点的边进行采样。</p>
</div>
<div class='code'>
<div class="highlight"><pre><span class="lineno">195</span> <span class="k">def</span> <span class="nf">run</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span></pre></div>
</div>
</div>
<div class='section' id='section-53'>
<div class='docs'>
<div class='section-link'>
<a href='#section-53'>#</a>
</div>
<p>将特征向量移动到设备</p>
</div>
<div class='code'>
<div class="highlight"><pre><span class="lineno">205</span> <span class="n">features</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">dataset</span><span class="o">.</span><span class="n">features</span><span class="o">.</span><span class="n">to</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">device</span><span class="p">)</span></pre></div>
</div>
</div>
<div class='section' id='section-54'>
<div class='docs'>
<div class='section-link'>
<a href='#section-54'>#</a>
</div>
<p>将标签移到设备上</p>
</div>
<div class='code'>
<div class="highlight"><pre><span class="lineno">207</span> <span class="n">labels</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">dataset</span><span class="o">.</span><span class="n">labels</span><span class="o">.</span><span class="n">to</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">device</span><span class="p">)</span></pre></div>
</div>
</div>
<div class='section' id='section-55'>
<div class='docs'>
<div class='section-link'>
<a href='#section-55'>#</a>
</div>
<p>将邻接矩阵移至设备</p>
</div>
<div class='code'>
<div class="highlight"><pre><span class="lineno">209</span> <span class="n">edges_adj</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">dataset</span><span class="o">.</span><span class="n">adj_mat</span><span class="o">.</span><span class="n">to</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">device</span><span class="p">)</span></pre></div>
</div>
</div>
<div class='section' id='section-56'>
<div class='docs'>
<div class='section-link'>
<a href='#section-56'>#</a>
</div>
<p>为头部添加一个空的第三个维度</p>
</div>
<div class='code'>
<div class="highlight"><pre><span class="lineno">211</span> <span class="n">edges_adj</span> <span class="o">=</span> <span class="n">edges_adj</span><span class="o">.</span><span class="n">unsqueeze</span><span class="p">(</span><span class="o">-</span><span class="mi">1</span><span class="p">)</span></pre></div>
</div>
</div>
<div class='section' id='section-57'>
<div class='docs'>
<div class='section-link'>
<a href='#section-57'>#</a>
</div>
<p>随机索引</p>
</div>
<div class='code'>
<div class="highlight"><pre><span class="lineno">214</span> <span class="n">idx_rand</span> <span class="o">=</span> <span class="n">torch</span><span class="o">.</span><span class="n">randperm</span><span class="p">(</span><span class="nb">len</span><span class="p">(</span><span class="n">labels</span><span class="p">))</span></pre></div>
</div>
</div>
<div class='section' id='section-58'>
<div class='docs'>
<div class='section-link'>
<a href='#section-58'>#</a>
</div>
<p>训练节点</p>
</div>
<div class='code'>
<div class="highlight"><pre><span class="lineno">216</span> <span class="n">idx_train</span> <span class="o">=</span> <span class="n">idx_rand</span><span class="p">[:</span><span class="bp">self</span><span class="o">.</span><span class="n">training_samples</span><span class="p">]</span></pre></div>
</div>
</div>
<div class='section' id='section-59'>
<div class='docs'>
<div class='section-link'>
<a href='#section-59'>#</a>
</div>
<p>用于验证的节点</p>
</div>
<div class='code'>
<div class="highlight"><pre><span class="lineno">218</span> <span class="n">idx_valid</span> <span class="o">=</span> <span class="n">idx_rand</span><span class="p">[</span><span class="bp">self</span><span class="o">.</span><span class="n">training_samples</span><span class="p">:]</span></pre></div>
</div>
</div>
<div class='section' id='section-60'>
<div class='docs'>
<div class='section-link'>
<a href='#section-60'>#</a>
</div>
<p>训练循环</p>
</div>
<div class='code'>
<div class="highlight"><pre><span class="lineno">221</span> <span class="k">for</span> <span class="n">epoch</span> <span class="ow">in</span> <span class="n">monit</span><span class="o">.</span><span class="n">loop</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">epochs</span><span class="p">):</span></pre></div>
</div>
</div>
<div class='section' id='section-61'>
<div class='docs'>
<div class='section-link'>
<a href='#section-61'>#</a>
</div>
<p>将模型设置为训练模式</p>
</div>
<div class='code'>
<div class="highlight"><pre><span class="lineno">223</span> <span class="bp">self</span><span class="o">.</span><span class="n">model</span><span class="o">.</span><span class="n">train</span><span class="p">()</span></pre></div>
</div>
</div>
<div class='section' id='section-62'>
<div class='docs'>
<div class='section-link'>
<a href='#section-62'>#</a>
</div>
<p>将所有渐变设为零</p>
</div>
<div class='code'>
<div class="highlight"><pre><span class="lineno">225</span> <span class="bp">self</span><span class="o">.</span><span class="n">optimizer</span><span class="o">.</span><span class="n">zero_grad</span><span class="p">()</span></pre></div>
</div>
</div>
<div class='section' id='section-63'>
<div class='docs'>
<div class='section-link'>
<a href='#section-63'>#</a>
</div>
<p>评估模型</p>
</div>
<div class='code'>
<div class="highlight"><pre><span class="lineno">227</span> <span class="n">output</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">model</span><span class="p">(</span><span class="n">features</span><span class="p">,</span> <span class="n">edges_adj</span><span class="p">)</span></pre></div>
</div>
</div>
<div class='section' id='section-64'>
<div class='docs'>
<div class='section-link'>
<a href='#section-64'>#</a>
</div>
<p>获得训练节点的损失</p>
</div>
<div class='code'>
<div class="highlight"><pre><span class="lineno">229</span> <span class="n">loss</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">loss_func</span><span class="p">(</span><span class="n">output</span><span class="p">[</span><span class="n">idx_train</span><span class="p">],</span> <span class="n">labels</span><span class="p">[</span><span class="n">idx_train</span><span class="p">])</span></pre></div>
</div>
</div>
<div class='section' id='section-65'>
<div class='docs'>
<div class='section-link'>
<a href='#section-65'>#</a>
</div>
<p>计算梯度</p>
</div>
<div class='code'>
<div class="highlight"><pre><span class="lineno">231</span> <span class="n">loss</span><span class="o">.</span><span class="n">backward</span><span class="p">()</span></pre></div>
</div>
</div>
<div class='section' id='section-66'>
<div class='docs'>
<div class='section-link'>
<a href='#section-66'>#</a>
</div>
<p>采取优化步骤</p>
</div>
<div class='code'>
<div class="highlight"><pre><span class="lineno">233</span> <span class="bp">self</span><span class="o">.</span><span class="n">optimizer</span><span class="o">.</span><span class="n">step</span><span class="p">()</span></pre></div>
</div>
</div>
<div class='section' id='section-67'>
<div class='docs'>
<div class='section-link'>
<a href='#section-67'>#</a>
</div>
<p>记录损失</p>
</div>
<div class='code'>
<div class="highlight"><pre><span class="lineno">235</span> <span class="n">tracker</span><span class="o">.</span><span class="n">add</span><span class="p">(</span><span class="s1">&#39;loss.train&#39;</span><span class="p">,</span> <span class="n">loss</span><span class="p">)</span></pre></div>
</div>
</div>
<div class='section' id='section-68'>
<div class='docs'>
<div class='section-link'>
<a href='#section-68'>#</a>
</div>
<p>记录准确性</p>
</div>
<div class='code'>
<div class="highlight"><pre><span class="lineno">237</span> <span class="n">tracker</span><span class="o">.</span><span class="n">add</span><span class="p">(</span><span class="s1">&#39;accuracy.train&#39;</span><span class="p">,</span> <span class="n">accuracy</span><span class="p">(</span><span class="n">output</span><span class="p">[</span><span class="n">idx_train</span><span class="p">],</span> <span class="n">labels</span><span class="p">[</span><span class="n">idx_train</span><span class="p">]))</span></pre></div>
</div>
</div>
<div class='section' id='section-69'>
<div class='docs'>
<div class='section-link'>
<a href='#section-69'>#</a>
</div>
<p>将模式设置为评估模式以进行验证</p>
</div>
<div class='code'>
<div class="highlight"><pre><span class="lineno">240</span> <span class="bp">self</span><span class="o">.</span><span class="n">model</span><span class="o">.</span><span class="n">eval</span><span class="p">()</span></pre></div>
</div>
</div>
<div class='section' id='section-70'>
<div class='docs'>
<div class='section-link'>
<a href='#section-70'>#</a>
</div>
<p>无需计算梯度</p>
</div>
<div class='code'>
<div class="highlight"><pre><span class="lineno">243</span> <span class="k">with</span> <span class="n">torch</span><span class="o">.</span><span class="n">no_grad</span><span class="p">():</span></pre></div>
</div>
</div>
<div class='section' id='section-71'>
<div class='docs'>
<div class='section-link'>
<a href='#section-71'>#</a>
</div>
<p>再次评估模型</p>
</div>
<div class='code'>
<div class="highlight"><pre><span class="lineno">245</span> <span class="n">output</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">model</span><span class="p">(</span><span class="n">features</span><span class="p">,</span> <span class="n">edges_adj</span><span class="p">)</span></pre></div>
</div>
</div>
<div class='section' id='section-72'>
<div class='docs'>
<div class='section-link'>
<a href='#section-72'>#</a>
</div>
<p>计算验证节点的损失</p>
</div>
<div class='code'>
<div class="highlight"><pre><span class="lineno">247</span> <span class="n">loss</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">loss_func</span><span class="p">(</span><span class="n">output</span><span class="p">[</span><span class="n">idx_valid</span><span class="p">],</span> <span class="n">labels</span><span class="p">[</span><span class="n">idx_valid</span><span class="p">])</span></pre></div>
</div>
</div>
<div class='section' id='section-73'>
<div class='docs'>
<div class='section-link'>
<a href='#section-73'>#</a>
</div>
<p>记录损失</p>
</div>
<div class='code'>
<div class="highlight"><pre><span class="lineno">249</span> <span class="n">tracker</span><span class="o">.</span><span class="n">add</span><span class="p">(</span><span class="s1">&#39;loss.valid&#39;</span><span class="p">,</span> <span class="n">loss</span><span class="p">)</span></pre></div>
</div>
</div>
<div class='section' id='section-74'>
<div class='docs'>
<div class='section-link'>
<a href='#section-74'>#</a>
</div>
<p>记录准确性</p>
</div>
<div class='code'>
<div class="highlight"><pre><span class="lineno">251</span> <span class="n">tracker</span><span class="o">.</span><span class="n">add</span><span class="p">(</span><span class="s1">&#39;accuracy.valid&#39;</span><span class="p">,</span> <span class="n">accuracy</span><span class="p">(</span><span class="n">output</span><span class="p">[</span><span class="n">idx_valid</span><span class="p">],</span> <span class="n">labels</span><span class="p">[</span><span class="n">idx_valid</span><span class="p">]))</span></pre></div>
</div>
</div>
<div class='section' id='section-75'>
<div class='docs'>
<div class='section-link'>
<a href='#section-75'>#</a>
</div>
<p>保存日志</p>
</div>
<div class='code'>
<div class="highlight"><pre><span class="lineno">254</span> <span class="n">tracker</span><span class="o">.</span><span class="n">save</span><span class="p">()</span></pre></div>
</div>
</div>
<div class='section' id='section-76'>
<div class='docs doc-strings'>
<div class='section-link'>
<a href='#section-76'>#</a>
</div>
<p>创建 Cora 数据集</p>
</div>
<div class='code'>
<div class="highlight"><pre><span class="lineno">257</span><span class="nd">@option</span><span class="p">(</span><span class="n">Configs</span><span class="o">.</span><span class="n">dataset</span><span class="p">)</span>
<span class="lineno">258</span><span class="k">def</span> <span class="nf">cora_dataset</span><span class="p">(</span><span class="n">c</span><span class="p">:</span> <span class="n">Configs</span><span class="p">):</span></pre></div>
</div>
</div>
<div class='section' id='section-77'>
<div class='docs'>
<div class='section-link'>
<a href='#section-77'>#</a>
</div>
</div>
<div class='code'>
<div class="highlight"><pre><span class="lineno">262</span> <span class="k">return</span> <span class="n">CoraDataset</span><span class="p">(</span><span class="n">c</span><span class="o">.</span><span class="n">include_edges</span><span class="p">)</span></pre></div>
</div>
</div>
<div class='section' id='section-78'>
<div class='docs'>
<div class='section-link'>
<a href='#section-78'>#</a>
</div>
<p>获取班级数</p>
</div>
<div class='code'>
<div class="highlight"><pre><span class="lineno">266</span><span class="n">calculate</span><span class="p">(</span><span class="n">Configs</span><span class="o">.</span><span class="n">n_classes</span><span class="p">,</span> <span class="k">lambda</span> <span class="n">c</span><span class="p">:</span> <span class="nb">len</span><span class="p">(</span><span class="n">c</span><span class="o">.</span><span class="n">dataset</span><span class="o">.</span><span class="n">classes</span><span class="p">))</span></pre></div>
</div>
</div>
<div class='section' id='section-79'>
<div class='docs'>
<div class='section-link'>
<a href='#section-79'>#</a>
</div>
<p>输入中的要素数量</p>
</div>
<div class='code'>
<div class="highlight"><pre><span class="lineno">268</span><span class="n">calculate</span><span class="p">(</span><span class="n">Configs</span><span class="o">.</span><span class="n">in_features</span><span class="p">,</span> <span class="k">lambda</span> <span class="n">c</span><span class="p">:</span> <span class="n">c</span><span class="o">.</span><span class="n">dataset</span><span class="o">.</span><span class="n">features</span><span class="o">.</span><span class="n">shape</span><span class="p">[</span><span class="mi">1</span><span class="p">])</span></pre></div>
</div>
</div>
<div class='section' id='section-80'>
<div class='docs doc-strings'>
<div class='section-link'>
<a href='#section-80'>#</a>
</div>
<p>创建 GAT 模型</p>
</div>
<div class='code'>
<div class="highlight"><pre><span class="lineno">271</span><span class="nd">@option</span><span class="p">(</span><span class="n">Configs</span><span class="o">.</span><span class="n">model</span><span class="p">)</span>
<span class="lineno">272</span><span class="k">def</span> <span class="nf">gat_model</span><span class="p">(</span><span class="n">c</span><span class="p">:</span> <span class="n">Configs</span><span class="p">):</span></pre></div>
</div>
</div>
<div class='section' id='section-81'>
<div class='docs'>
<div class='section-link'>
<a href='#section-81'>#</a>
</div>
</div>
<div class='code'>
<div class="highlight"><pre><span class="lineno">276</span> <span class="k">return</span> <span class="n">GAT</span><span class="p">(</span><span class="n">c</span><span class="o">.</span><span class="n">in_features</span><span class="p">,</span> <span class="n">c</span><span class="o">.</span><span class="n">n_hidden</span><span class="p">,</span> <span class="n">c</span><span class="o">.</span><span class="n">n_classes</span><span class="p">,</span> <span class="n">c</span><span class="o">.</span><span class="n">n_heads</span><span class="p">,</span> <span class="n">c</span><span class="o">.</span><span class="n">dropout</span><span class="p">)</span><span class="o">.</span><span class="n">to</span><span class="p">(</span><span class="n">c</span><span class="o">.</span><span class="n">device</span><span class="p">)</span></pre></div>
</div>
</div>
<div class='section' id='section-82'>
<div class='docs doc-strings'>
<div class='section-link'>
<a href='#section-82'>#</a>
</div>
<p>创建可配置的优化器</p>
</div>
<div class='code'>
<div class="highlight"><pre><span class="lineno">279</span><span class="nd">@option</span><span class="p">(</span><span class="n">Configs</span><span class="o">.</span><span class="n">optimizer</span><span class="p">)</span>
<span class="lineno">280</span><span class="k">def</span> <span class="nf">_optimizer</span><span class="p">(</span><span class="n">c</span><span class="p">:</span> <span class="n">Configs</span><span class="p">):</span></pre></div>
</div>
</div>
<div class='section' id='section-83'>
<div class='docs'>
<div class='section-link'>
<a href='#section-83'>#</a>
</div>
</div>
<div class='code'>
<div class="highlight"><pre><span class="lineno">284</span> <span class="n">opt_conf</span> <span class="o">=</span> <span class="n">OptimizerConfigs</span><span class="p">()</span>
<span class="lineno">285</span> <span class="n">opt_conf</span><span class="o">.</span><span class="n">parameters</span> <span class="o">=</span> <span class="n">c</span><span class="o">.</span><span class="n">model</span><span class="o">.</span><span class="n">parameters</span><span class="p">()</span>
<span class="lineno">286</span> <span class="k">return</span> <span class="n">opt_conf</span></pre></div>
</div>
</div>
<div class='section' id='section-84'>
<div class='docs'>
<div class='section-link'>
<a href='#section-84'>#</a>
</div>
</div>
<div class='code'>
<div class="highlight"><pre><span class="lineno">289</span><span class="k">def</span> <span class="nf">main</span><span class="p">():</span></pre></div>
</div>
</div>
<div class='section' id='section-85'>
<div class='docs'>
<div class='section-link'>
<a href='#section-85'>#</a>
</div>
<p>创建配置</p>
</div>
<div class='code'>
<div class="highlight"><pre><span class="lineno">291</span> <span class="n">conf</span> <span class="o">=</span> <span class="n">Configs</span><span class="p">()</span></pre></div>
</div>
</div>
<div class='section' id='section-86'>
<div class='docs'>
<div class='section-link'>
<a href='#section-86'>#</a>
</div>
<p>创建实验</p>
</div>
<div class='code'>
<div class="highlight"><pre><span class="lineno">293</span> <span class="n">experiment</span><span class="o">.</span><span class="n">create</span><span class="p">(</span><span class="n">name</span><span class="o">=</span><span class="s1">&#39;gat&#39;</span><span class="p">)</span></pre></div>
</div>
</div>
<div class='section' id='section-87'>
<div class='docs'>
<div class='section-link'>
<a href='#section-87'>#</a>
</div>
<p>计算配置。</p>
</div>
<div class='code'>
<div class="highlight"><pre><span class="lineno">295</span> <span class="n">experiment</span><span class="o">.</span><span class="n">configs</span><span class="p">(</span><span class="n">conf</span><span class="p">,</span> <span class="p">{</span></pre></div>
</div>
</div>
<div class='section' id='section-88'>
<div class='docs'>
<div class='section-link'>
<a href='#section-88'>#</a>
</div>
<p>Adam 优化器</p>
</div>
<div class='code'>
<div class="highlight"><pre><span class="lineno">297</span> <span class="s1">&#39;optimizer.optimizer&#39;</span><span class="p">:</span> <span class="s1">&#39;Adam&#39;</span><span class="p">,</span>
<span class="lineno">298</span> <span class="s1">&#39;optimizer.learning_rate&#39;</span><span class="p">:</span> <span class="mf">5e-3</span><span class="p">,</span>
<span class="lineno">299</span> <span class="s1">&#39;optimizer.weight_decay&#39;</span><span class="p">:</span> <span class="mf">5e-4</span><span class="p">,</span>
<span class="lineno">300</span> <span class="p">})</span></pre></div>
</div>
</div>
<div class='section' id='section-89'>
<div class='docs'>
<div class='section-link'>
<a href='#section-89'>#</a>
</div>
<p>开始观看实验</p>
</div>
<div class='code'>
<div class="highlight"><pre><span class="lineno">303</span> <span class="k">with</span> <span class="n">experiment</span><span class="o">.</span><span class="n">start</span><span class="p">():</span></pre></div>
</div>
</div>
<div class='section' id='section-90'>
<div class='docs'>
<div class='section-link'>
<a href='#section-90'>#</a>
</div>
<p>运行训练</p>
</div>
<div class='code'>
<div class="highlight"><pre><span class="lineno">305</span> <span class="n">conf</span><span class="o">.</span><span class="n">run</span><span class="p">()</span></pre></div>
</div>
</div>
<div class='section' id='section-91'>
<div class='docs'>
<div class='section-link'>
<a href='#section-91'>#</a>
</div>
<p></p>
</div>
<div class='code'>
<div class="highlight"><pre><span class="lineno">309</span><span class="k">if</span> <span class="vm">__name__</span> <span class="o">==</span> <span class="s1">&#39;__main__&#39;</span><span class="p">:</span>
<span class="lineno">310</span> <span class="n">main</span><span class="p">()</span></pre></div>
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function handleImages() {
var images = document.querySelectorAll('p>img')
for (var i = 0; i < images.length; ++i) {
handleImage(images[i])
}
}
function handleImage(img) {
img.parentElement.style.textAlign = 'center'
var modal = document.createElement('div')
modal.id = 'modal'
var modalContent = document.createElement('div')
modal.appendChild(modalContent)
var modalImage = document.createElement('img')
modalContent.appendChild(modalImage)
var span = document.createElement('span')
span.classList.add('close')
span.textContent = 'x'
modal.appendChild(span)
img.onclick = function () {
console.log('clicked')
document.body.appendChild(modal)
modalImage.src = img.src
}
span.onclick = function () {
document.body.removeChild(modal)
}
}
handleImages()
</script>
</body>
</html>
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