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<title>Rank API | HugeGraph</title>
<meta name="description" content="4.1 rank API 概述
HugeGraphServer 除了上一节提到的遍历（traverser）方法，还提供了一类专门做推荐的方法，我们称为rank API，
可在图中为一个点推荐与其关系密切的其它点。
4.2 rank API 详解
4.2.1 Personal Rank API …">
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<meta property="og:description" content="4.1 rank API 概述 HugeGraphServer 除了上一节提到的遍历（traverser）方法，还提供了一类专门做推荐的方法，我们称为rank API， 可在图中为一个点推荐与其关系密切的其它点。
4.2 rank API 详解 4.2.1 Personal Rank API Personal Rank 算法典型场景是用于推荐应用中, 根据某个点现有的出边, 推荐具有相近 / 相同关系的其他点, 比如根据某个人的阅读记录 / 习惯, 向它推荐其他可能感兴趣的书, 或潜在的书友, 举例如下:
假设给定 1个 Person 点 是 tom, 它喜欢 a,b,c,d,e 5本书, 我们的想给 tom 推荐一些书友, 以及一些书, 最容易的想法就是看看还有哪些人喜欢过这些书 (共同兴趣) 那么此时, 需要有其它的 Person 点比如 neo, 他喜欢 b,d,f 3本书, 以及 jay, 它喜欢 c,d,e,g 4本书, lee 它喜欢 a,d,e,f 4本书 由于 tom 已经看过的书不需要重复推荐, 所以返回结果里应该期望推荐有共同喜好的其他书友看过, 但 tom 没看过的书, 比如推荐 &ldquo;f&rdquo; 和 &ldquo;g&rdquo; 书, 且优先级 f &gt; g 此时再计算 tom 的个性化 rank 值, 就会返回排序后 TopN 推荐的 书友 &#43; 书 的结果了 (如果只需要推荐的书, 选择 OTHER_LABEL 即可) 4." />
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<meta itemprop="description" content="4.1 rank API 概述 HugeGraphServer 除了上一节提到的遍历（traverser）方法，还提供了一类专门做推荐的方法，我们称为rank API， 可在图中为一个点推荐与其关系密切的其它点。
4.2 rank API 详解 4.2.1 Personal Rank API Personal Rank 算法典型场景是用于推荐应用中, 根据某个点现有的出边, 推荐具有相近 / 相同关系的其他点, 比如根据某个人的阅读记录 / 习惯, 向它推荐其他可能感兴趣的书, 或潜在的书友, 举例如下:
假设给定 1个 Person 点 是 tom, 它喜欢 a,b,c,d,e 5本书, 我们的想给 tom 推荐一些书友, 以及一些书, 最容易的想法就是看看还有哪些人喜欢过这些书 (共同兴趣) 那么此时, 需要有其它的 Person 点比如 neo, 他喜欢 b,d,f 3本书, 以及 jay, 它喜欢 c,d,e,g 4本书, lee 它喜欢 a,d,e,f 4本书 由于 tom 已经看过的书不需要重复推荐, 所以返回结果里应该期望推荐有共同喜好的其他书友看过, 但 tom 没看过的书, 比如推荐 &ldquo;f&rdquo; 和 &ldquo;g&rdquo; 书, 且优先级 f &gt; g 此时再计算 tom 的个性化 rank 值, 就会返回排序后 TopN 推荐的 书友 &#43; 书 的结果了 (如果只需要推荐的书, 选择 OTHER_LABEL 即可) 4.">
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<meta name="twitter:description" content="4.1 rank API 概述 HugeGraphServer 除了上一节提到的遍历（traverser）方法，还提供了一类专门做推荐的方法，我们称为rank API， 可在图中为一个点推荐与其关系密切的其它点。
4.2 rank API 详解 4.2.1 Personal Rank API Personal Rank 算法典型场景是用于推荐应用中, 根据某个点现有的出边, 推荐具有相近 / 相同关系的其他点, 比如根据某个人的阅读记录 / 习惯, 向它推荐其他可能感兴趣的书, 或潜在的书友, 举例如下:
假设给定 1个 Person 点 是 tom, 它喜欢 a,b,c,d,e 5本书, 我们的想给 tom 推荐一些书友, 以及一些书, 最容易的想法就是看看还有哪些人喜欢过这些书 (共同兴趣) 那么此时, 需要有其它的 Person 点比如 neo, 他喜欢 b,d,f 3本书, 以及 jay, 它喜欢 c,d,e,g 4本书, lee 它喜欢 a,d,e,f 4本书 由于 tom 已经看过的书不需要重复推荐, 所以返回结果里应该期望推荐有共同喜好的其他书友看过, 但 tom 没看过的书, 比如推荐 &ldquo;f&rdquo; 和 &ldquo;g&rdquo; 书, 且优先级 f &gt; g 此时再计算 tom 的个性化 rank 值, 就会返回排序后 TopN 推荐的 书友 &#43; 书 的结果了 (如果只需要推荐的书, 选择 OTHER_LABEL 即可) 4."/>
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<li><a href="#41-rank-api-概述">4.1 rank API 概述</a></li>
<li><a href="#42-rank-api-详解">4.2 rank API 详解</a></li>
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<h1>Rank API</h1>
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<h3 id="41-rank-api-概述">4.1 rank API 概述</h3>
<p>HugeGraphServer 除了上一节提到的遍历（traverser）方法，还提供了一类专门做推荐的方法，我们称为<code>rank API</code>，
可在图中为一个点推荐与其关系密切的其它点。</p>
<h3 id="42-rank-api-详解">4.2 rank API 详解</h3>
<h4 id="421-personal-rank-api">4.2.1 Personal Rank API</h4>
<p>Personal Rank 算法典型场景是用于推荐应用中, 根据某个点现有的出边, 推荐具有相近 / 相同关系的其他点,
比如根据某个人的阅读记录 / 习惯, 向它推荐其他可能感兴趣的书, 或潜在的书友, 举例如下:</p>
<ol>
<li>假设给定 1个 Person 点 是 tom, 它喜欢 <code>a,b,c,d,e</code> 5本书, 我们的想给 tom 推荐一些书友, 以及一些书, 最容易的想法就是看看还有哪些人喜欢过这些书 (共同兴趣)</li>
<li>那么此时, 需要有其它的 Person 点比如 neo, 他喜欢 <code>b,d,f</code> 3本书, 以及 jay, 它喜欢 <code>c,d,e,g</code> 4本书, lee 它喜欢 <code>a,d,e,f</code> 4本书</li>
<li>由于 tom 已经看过的书不需要重复推荐, 所以返回结果里应该期望推荐有共同喜好的其他书友看过, 但 tom 没看过的书, 比如推荐 &ldquo;f&rdquo; 和 &ldquo;g&rdquo; 书, 且优先级 f &gt; g</li>
<li>此时再计算 tom 的个性化 rank 值, 就会返回排序后 TopN 推荐的 书友 + 书 的结果了 (如果只需要推荐的书, 选择 OTHER_LABEL 即可)</li>
</ol>
<h5 id="4210-数据准备">4.2.1.0 数据准备</h5>
<p>上面是一个简单的例子, 这里再提供一个公开的 1MB 测试数据集 <a href="https://grouplens.org/datasets/movielens/">MovieLens</a> 为例，
用户需下载该数据集，然后使用 HugeGraph-Loader 导入到 HugeGraph 中，简单起见，数据中顶点 user
和 movie 的属性都忽略，仅使用 id 字段即可，边 rating 的具体评分值也忽略。loader 使用的元数据
文件和输入源映射文件内容如下：</p>
<div class="highlight"><pre tabindex="0" style="background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4;"><code class="language-groovy" data-lang="groovy"><span style="display:flex;"><span><span style="color:#8f5902;font-style:italic">////////////////////////////////////////////////////////////
</span></span></span><span style="display:flex;"><span><span style="color:#8f5902;font-style:italic">// UserID::Gender::Age::Occupation::Zip-code
</span></span></span><span style="display:flex;"><span><span style="color:#8f5902;font-style:italic">// MovieID::Title::Genres
</span></span></span><span style="display:flex;"><span><span style="color:#8f5902;font-style:italic">// UserID::MovieID::Rating::Timestamp
</span></span></span><span style="display:flex;"><span><span style="color:#8f5902;font-style:italic">////////////////////////////////////////////////////////////
</span></span></span><span style="display:flex;"><span><span style="color:#8f5902;font-style:italic"></span>
</span></span><span style="display:flex;"><span><span style="color:#8f5902;font-style:italic">// Define schema
</span></span></span><span style="display:flex;"><span><span style="color:#8f5902;font-style:italic"></span><span style="color:#000">schema</span><span style="color:#ce5c00;font-weight:bold">.</span><span style="color:#c4a000">propertyKey</span><span style="color:#ce5c00;font-weight:bold">(</span><span style="color:#4e9a06">&#34;id&#34;</span><span style="color:#ce5c00;font-weight:bold">).</span><span style="color:#c4a000">asInt</span><span style="color:#ce5c00;font-weight:bold">().</span><span style="color:#c4a000">ifNotExist</span><span style="color:#ce5c00;font-weight:bold">().</span><span style="color:#c4a000">create</span><span style="color:#ce5c00;font-weight:bold">();</span>
</span></span><span style="display:flex;"><span><span style="color:#000">schema</span><span style="color:#ce5c00;font-weight:bold">.</span><span style="color:#c4a000">propertyKey</span><span style="color:#ce5c00;font-weight:bold">(</span><span style="color:#4e9a06">&#34;rate&#34;</span><span style="color:#ce5c00;font-weight:bold">).</span><span style="color:#c4a000">asInt</span><span style="color:#ce5c00;font-weight:bold">().</span><span style="color:#c4a000">ifNotExist</span><span style="color:#ce5c00;font-weight:bold">().</span><span style="color:#c4a000">create</span><span style="color:#ce5c00;font-weight:bold">();</span>
</span></span><span style="display:flex;"><span>
</span></span><span style="display:flex;"><span><span style="color:#000">schema</span><span style="color:#ce5c00;font-weight:bold">.</span><span style="color:#c4a000">vertexLabel</span><span style="color:#ce5c00;font-weight:bold">(</span><span style="color:#4e9a06">&#34;user&#34;</span><span style="color:#ce5c00;font-weight:bold">)</span>
</span></span><span style="display:flex;"><span> <span style="color:#ce5c00;font-weight:bold">.</span><span style="color:#c4a000">properties</span><span style="color:#ce5c00;font-weight:bold">(</span><span style="color:#4e9a06">&#34;id&#34;</span><span style="color:#ce5c00;font-weight:bold">)</span>
</span></span><span style="display:flex;"><span> <span style="color:#ce5c00;font-weight:bold">.</span><span style="color:#c4a000">primaryKeys</span><span style="color:#ce5c00;font-weight:bold">(</span><span style="color:#4e9a06">&#34;id&#34;</span><span style="color:#ce5c00;font-weight:bold">)</span>
</span></span><span style="display:flex;"><span> <span style="color:#ce5c00;font-weight:bold">.</span><span style="color:#c4a000">ifNotExist</span><span style="color:#ce5c00;font-weight:bold">()</span>
</span></span><span style="display:flex;"><span> <span style="color:#ce5c00;font-weight:bold">.</span><span style="color:#c4a000">create</span><span style="color:#ce5c00;font-weight:bold">();</span>
</span></span><span style="display:flex;"><span><span style="color:#000">schema</span><span style="color:#ce5c00;font-weight:bold">.</span><span style="color:#c4a000">vertexLabel</span><span style="color:#ce5c00;font-weight:bold">(</span><span style="color:#4e9a06">&#34;movie&#34;</span><span style="color:#ce5c00;font-weight:bold">)</span>
</span></span><span style="display:flex;"><span> <span style="color:#ce5c00;font-weight:bold">.</span><span style="color:#c4a000">properties</span><span style="color:#ce5c00;font-weight:bold">(</span><span style="color:#4e9a06">&#34;id&#34;</span><span style="color:#ce5c00;font-weight:bold">)</span>
</span></span><span style="display:flex;"><span> <span style="color:#ce5c00;font-weight:bold">.</span><span style="color:#c4a000">primaryKeys</span><span style="color:#ce5c00;font-weight:bold">(</span><span style="color:#4e9a06">&#34;id&#34;</span><span style="color:#ce5c00;font-weight:bold">)</span>
</span></span><span style="display:flex;"><span> <span style="color:#ce5c00;font-weight:bold">.</span><span style="color:#c4a000">ifNotExist</span><span style="color:#ce5c00;font-weight:bold">()</span>
</span></span><span style="display:flex;"><span> <span style="color:#ce5c00;font-weight:bold">.</span><span style="color:#c4a000">create</span><span style="color:#ce5c00;font-weight:bold">();</span>
</span></span><span style="display:flex;"><span>
</span></span><span style="display:flex;"><span><span style="color:#000">schema</span><span style="color:#ce5c00;font-weight:bold">.</span><span style="color:#c4a000">edgeLabel</span><span style="color:#ce5c00;font-weight:bold">(</span><span style="color:#4e9a06">&#34;rating&#34;</span><span style="color:#ce5c00;font-weight:bold">)</span>
</span></span><span style="display:flex;"><span> <span style="color:#ce5c00;font-weight:bold">.</span><span style="color:#c4a000">sourceLabel</span><span style="color:#ce5c00;font-weight:bold">(</span><span style="color:#4e9a06">&#34;user&#34;</span><span style="color:#ce5c00;font-weight:bold">)</span>
</span></span><span style="display:flex;"><span> <span style="color:#ce5c00;font-weight:bold">.</span><span style="color:#c4a000">targetLabel</span><span style="color:#ce5c00;font-weight:bold">(</span><span style="color:#4e9a06">&#34;movie&#34;</span><span style="color:#ce5c00;font-weight:bold">)</span>
</span></span><span style="display:flex;"><span> <span style="color:#ce5c00;font-weight:bold">.</span><span style="color:#c4a000">properties</span><span style="color:#ce5c00;font-weight:bold">(</span><span style="color:#4e9a06">&#34;rate&#34;</span><span style="color:#ce5c00;font-weight:bold">)</span>
</span></span><span style="display:flex;"><span> <span style="color:#ce5c00;font-weight:bold">.</span><span style="color:#c4a000">ifNotExist</span><span style="color:#ce5c00;font-weight:bold">()</span>
</span></span><span style="display:flex;"><span> <span style="color:#ce5c00;font-weight:bold">.</span><span style="color:#c4a000">create</span><span style="color:#ce5c00;font-weight:bold">();</span>
</span></span></code></pre></div><div class="highlight"><pre tabindex="0" style="background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4;"><code class="language-json" data-lang="json"><span style="display:flex;"><span><span style="color:#000;font-weight:bold">{</span>
</span></span><span style="display:flex;"><span> <span style="color:#204a87;font-weight:bold">&#34;vertices&#34;</span><span style="color:#000;font-weight:bold">:</span> <span style="color:#000;font-weight:bold">[</span>
</span></span><span style="display:flex;"><span> <span style="color:#000;font-weight:bold">{</span>
</span></span><span style="display:flex;"><span> <span style="color:#204a87;font-weight:bold">&#34;label&#34;</span><span style="color:#000;font-weight:bold">:</span> <span style="color:#4e9a06">&#34;user&#34;</span><span style="color:#000;font-weight:bold">,</span>
</span></span><span style="display:flex;"><span> <span style="color:#204a87;font-weight:bold">&#34;input&#34;</span><span style="color:#000;font-weight:bold">:</span> <span style="color:#000;font-weight:bold">{</span>
</span></span><span style="display:flex;"><span> <span style="color:#204a87;font-weight:bold">&#34;type&#34;</span><span style="color:#000;font-weight:bold">:</span> <span style="color:#4e9a06">&#34;file&#34;</span><span style="color:#000;font-weight:bold">,</span>
</span></span><span style="display:flex;"><span> <span style="color:#204a87;font-weight:bold">&#34;path&#34;</span><span style="color:#000;font-weight:bold">:</span> <span style="color:#4e9a06">&#34;users.dat&#34;</span><span style="color:#000;font-weight:bold">,</span>
</span></span><span style="display:flex;"><span> <span style="color:#204a87;font-weight:bold">&#34;format&#34;</span><span style="color:#000;font-weight:bold">:</span> <span style="color:#4e9a06">&#34;TEXT&#34;</span><span style="color:#000;font-weight:bold">,</span>
</span></span><span style="display:flex;"><span> <span style="color:#204a87;font-weight:bold">&#34;delimiter&#34;</span><span style="color:#000;font-weight:bold">:</span> <span style="color:#4e9a06">&#34;::&#34;</span><span style="color:#000;font-weight:bold">,</span>
</span></span><span style="display:flex;"><span> <span style="color:#204a87;font-weight:bold">&#34;header&#34;</span><span style="color:#000;font-weight:bold">:</span> <span style="color:#000;font-weight:bold">[</span><span style="color:#4e9a06">&#34;UserID&#34;</span><span style="color:#000;font-weight:bold">,</span> <span style="color:#4e9a06">&#34;Gender&#34;</span><span style="color:#000;font-weight:bold">,</span> <span style="color:#4e9a06">&#34;Age&#34;</span><span style="color:#000;font-weight:bold">,</span> <span style="color:#4e9a06">&#34;Occupation&#34;</span><span style="color:#000;font-weight:bold">,</span> <span style="color:#4e9a06">&#34;Zip-code&#34;</span><span style="color:#000;font-weight:bold">]</span>
</span></span><span style="display:flex;"><span> <span style="color:#000;font-weight:bold">},</span>
</span></span><span style="display:flex;"><span> <span style="color:#204a87;font-weight:bold">&#34;ignored&#34;</span><span style="color:#000;font-weight:bold">:</span> <span style="color:#000;font-weight:bold">[</span><span style="color:#4e9a06">&#34;Gender&#34;</span><span style="color:#000;font-weight:bold">,</span> <span style="color:#4e9a06">&#34;Age&#34;</span><span style="color:#000;font-weight:bold">,</span> <span style="color:#4e9a06">&#34;Occupation&#34;</span><span style="color:#000;font-weight:bold">,</span> <span style="color:#4e9a06">&#34;Zip-code&#34;</span><span style="color:#000;font-weight:bold">],</span>
</span></span><span style="display:flex;"><span> <span style="color:#204a87;font-weight:bold">&#34;mapping&#34;</span><span style="color:#000;font-weight:bold">:</span> <span style="color:#000;font-weight:bold">{</span>
</span></span><span style="display:flex;"><span> <span style="color:#204a87;font-weight:bold">&#34;UserID&#34;</span><span style="color:#000;font-weight:bold">:</span> <span style="color:#4e9a06">&#34;id&#34;</span>
</span></span><span style="display:flex;"><span> <span style="color:#000;font-weight:bold">}</span>
</span></span><span style="display:flex;"><span> <span style="color:#000;font-weight:bold">},</span>
</span></span><span style="display:flex;"><span> <span style="color:#000;font-weight:bold">{</span>
</span></span><span style="display:flex;"><span> <span style="color:#204a87;font-weight:bold">&#34;label&#34;</span><span style="color:#000;font-weight:bold">:</span> <span style="color:#4e9a06">&#34;movie&#34;</span><span style="color:#000;font-weight:bold">,</span>
</span></span><span style="display:flex;"><span> <span style="color:#204a87;font-weight:bold">&#34;input&#34;</span><span style="color:#000;font-weight:bold">:</span> <span style="color:#000;font-weight:bold">{</span>
</span></span><span style="display:flex;"><span> <span style="color:#204a87;font-weight:bold">&#34;type&#34;</span><span style="color:#000;font-weight:bold">:</span> <span style="color:#4e9a06">&#34;file&#34;</span><span style="color:#000;font-weight:bold">,</span>
</span></span><span style="display:flex;"><span> <span style="color:#204a87;font-weight:bold">&#34;path&#34;</span><span style="color:#000;font-weight:bold">:</span> <span style="color:#4e9a06">&#34;movies.dat&#34;</span><span style="color:#000;font-weight:bold">,</span>
</span></span><span style="display:flex;"><span> <span style="color:#204a87;font-weight:bold">&#34;format&#34;</span><span style="color:#000;font-weight:bold">:</span> <span style="color:#4e9a06">&#34;TEXT&#34;</span><span style="color:#000;font-weight:bold">,</span>
</span></span><span style="display:flex;"><span> <span style="color:#204a87;font-weight:bold">&#34;delimiter&#34;</span><span style="color:#000;font-weight:bold">:</span> <span style="color:#4e9a06">&#34;::&#34;</span><span style="color:#000;font-weight:bold">,</span>
</span></span><span style="display:flex;"><span> <span style="color:#204a87;font-weight:bold">&#34;header&#34;</span><span style="color:#000;font-weight:bold">:</span> <span style="color:#000;font-weight:bold">[</span><span style="color:#4e9a06">&#34;MovieID&#34;</span><span style="color:#000;font-weight:bold">,</span> <span style="color:#4e9a06">&#34;Title&#34;</span><span style="color:#000;font-weight:bold">,</span> <span style="color:#4e9a06">&#34;Genres&#34;</span><span style="color:#000;font-weight:bold">]</span>
</span></span><span style="display:flex;"><span> <span style="color:#000;font-weight:bold">},</span>
</span></span><span style="display:flex;"><span> <span style="color:#204a87;font-weight:bold">&#34;ignored&#34;</span><span style="color:#000;font-weight:bold">:</span> <span style="color:#000;font-weight:bold">[</span><span style="color:#4e9a06">&#34;Title&#34;</span><span style="color:#000;font-weight:bold">,</span> <span style="color:#4e9a06">&#34;Genres&#34;</span><span style="color:#000;font-weight:bold">],</span>
</span></span><span style="display:flex;"><span> <span style="color:#204a87;font-weight:bold">&#34;mapping&#34;</span><span style="color:#000;font-weight:bold">:</span> <span style="color:#000;font-weight:bold">{</span>
</span></span><span style="display:flex;"><span> <span style="color:#204a87;font-weight:bold">&#34;MovieID&#34;</span><span style="color:#000;font-weight:bold">:</span> <span style="color:#4e9a06">&#34;id&#34;</span>
</span></span><span style="display:flex;"><span> <span style="color:#000;font-weight:bold">}</span>
</span></span><span style="display:flex;"><span> <span style="color:#000;font-weight:bold">}</span>
</span></span><span style="display:flex;"><span> <span style="color:#000;font-weight:bold">],</span>
</span></span><span style="display:flex;"><span> <span style="color:#204a87;font-weight:bold">&#34;edges&#34;</span><span style="color:#000;font-weight:bold">:</span> <span style="color:#000;font-weight:bold">[</span>
</span></span><span style="display:flex;"><span> <span style="color:#000;font-weight:bold">{</span>
</span></span><span style="display:flex;"><span> <span style="color:#204a87;font-weight:bold">&#34;label&#34;</span><span style="color:#000;font-weight:bold">:</span> <span style="color:#4e9a06">&#34;rating&#34;</span><span style="color:#000;font-weight:bold">,</span>
</span></span><span style="display:flex;"><span> <span style="color:#204a87;font-weight:bold">&#34;source&#34;</span><span style="color:#000;font-weight:bold">:</span> <span style="color:#000;font-weight:bold">[</span><span style="color:#4e9a06">&#34;UserID&#34;</span><span style="color:#000;font-weight:bold">],</span>
</span></span><span style="display:flex;"><span> <span style="color:#204a87;font-weight:bold">&#34;target&#34;</span><span style="color:#000;font-weight:bold">:</span> <span style="color:#000;font-weight:bold">[</span><span style="color:#4e9a06">&#34;MovieID&#34;</span><span style="color:#000;font-weight:bold">],</span>
</span></span><span style="display:flex;"><span> <span style="color:#204a87;font-weight:bold">&#34;input&#34;</span><span style="color:#000;font-weight:bold">:</span> <span style="color:#000;font-weight:bold">{</span>
</span></span><span style="display:flex;"><span> <span style="color:#204a87;font-weight:bold">&#34;type&#34;</span><span style="color:#000;font-weight:bold">:</span> <span style="color:#4e9a06">&#34;file&#34;</span><span style="color:#000;font-weight:bold">,</span>
</span></span><span style="display:flex;"><span> <span style="color:#204a87;font-weight:bold">&#34;path&#34;</span><span style="color:#000;font-weight:bold">:</span> <span style="color:#4e9a06">&#34;ratings.dat&#34;</span><span style="color:#000;font-weight:bold">,</span>
</span></span><span style="display:flex;"><span> <span style="color:#204a87;font-weight:bold">&#34;format&#34;</span><span style="color:#000;font-weight:bold">:</span> <span style="color:#4e9a06">&#34;TEXT&#34;</span><span style="color:#000;font-weight:bold">,</span>
</span></span><span style="display:flex;"><span> <span style="color:#204a87;font-weight:bold">&#34;delimiter&#34;</span><span style="color:#000;font-weight:bold">:</span> <span style="color:#4e9a06">&#34;::&#34;</span><span style="color:#000;font-weight:bold">,</span>
</span></span><span style="display:flex;"><span> <span style="color:#204a87;font-weight:bold">&#34;header&#34;</span><span style="color:#000;font-weight:bold">:</span> <span style="color:#000;font-weight:bold">[</span><span style="color:#4e9a06">&#34;UserID&#34;</span><span style="color:#000;font-weight:bold">,</span> <span style="color:#4e9a06">&#34;MovieID&#34;</span><span style="color:#000;font-weight:bold">,</span> <span style="color:#4e9a06">&#34;Rating&#34;</span><span style="color:#000;font-weight:bold">,</span> <span style="color:#4e9a06">&#34;Timestamp&#34;</span><span style="color:#000;font-weight:bold">]</span>
</span></span><span style="display:flex;"><span> <span style="color:#000;font-weight:bold">},</span>
</span></span><span style="display:flex;"><span> <span style="color:#204a87;font-weight:bold">&#34;ignored&#34;</span><span style="color:#000;font-weight:bold">:</span> <span style="color:#000;font-weight:bold">[</span><span style="color:#4e9a06">&#34;Timestamp&#34;</span><span style="color:#000;font-weight:bold">],</span>
</span></span><span style="display:flex;"><span> <span style="color:#204a87;font-weight:bold">&#34;mapping&#34;</span><span style="color:#000;font-weight:bold">:</span> <span style="color:#000;font-weight:bold">{</span>
</span></span><span style="display:flex;"><span> <span style="color:#204a87;font-weight:bold">&#34;UserID&#34;</span><span style="color:#000;font-weight:bold">:</span> <span style="color:#4e9a06">&#34;id&#34;</span><span style="color:#000;font-weight:bold">,</span>
</span></span><span style="display:flex;"><span> <span style="color:#204a87;font-weight:bold">&#34;MovieID&#34;</span><span style="color:#000;font-weight:bold">:</span> <span style="color:#4e9a06">&#34;id&#34;</span><span style="color:#000;font-weight:bold">,</span>
</span></span><span style="display:flex;"><span> <span style="color:#204a87;font-weight:bold">&#34;Rating&#34;</span><span style="color:#000;font-weight:bold">:</span> <span style="color:#4e9a06">&#34;rate&#34;</span>
</span></span><span style="display:flex;"><span> <span style="color:#000;font-weight:bold">}</span>
</span></span><span style="display:flex;"><span> <span style="color:#000;font-weight:bold">}</span>
</span></span><span style="display:flex;"><span> <span style="color:#000;font-weight:bold">]</span>
</span></span><span style="display:flex;"><span><span style="color:#000;font-weight:bold">}</span>
</span></span></code></pre></div><blockquote>
<p>注意将映射文件中<code>input.path</code>的值修改为自己本地的路径。</p>
</blockquote>
<h5 id="4211-功能介绍">4.2.1.1 功能介绍</h5>
<p>适用于二分图，给出所有源顶点相关的其他顶点及其相关性组成的列表。</p>
<blockquote>
<p>二分图：也称二部图，是图论里的一种特殊模型，也是一种特殊的网络流。其最大的特点在于，可以将图里的顶点分为两个集合，两个集合之间的点有边相连，但集合内的点之间没有直接关联。</p>
</blockquote>
<p>假设有一个用户和物品的二分图，基于随机游走的 PersonalRank 算法步骤如下：</p>
<ol>
<li>选定一个起点用户 u，其初始权重为 1.0，从 Vu 开始游走（有 alpha 的概率走到邻居点，1 - alpha 的概率停留）；</li>
<li>如果决定向外游走, 那么会选取某一个类型的出边, 例如 <code>rating</code> 来查找共同的打分人：
<ol>
<li>那就从当前节点的邻居节点中按照均匀分布随机选择一个，并且按照均匀分布划分权重值；</li>
<li>给源顶点补偿权重 1 - alpha；</li>
<li>重复步骤2；</li>
</ol>
</li>
<li>达到一定步数或达到精度后收敛，得到推荐列表。</li>
</ol>
<h6 id="params">Params</h6>
<p><strong>必填项</strong>:</p>
<ul>
<li>source: 源顶点 id</li>
<li>label: 源点出发的某类边 label，须连接两类不同顶点</li>
</ul>
<p><strong>选填项</strong>:</p>
<ul>
<li>alpha：每轮迭代时从某个点往外走的概率，与 PageRank 算法中的 alpha 类似，取值区间为 (0, 1], 默认值 <code>0.85</code></li>
<li>max_degree: 查询过程中，单个顶点遍历的最大邻接边数目，默认为 <code>10000</code></li>
<li>max_depth: 迭代次数，取值区间为 [2, 50], 默认值 <code>5</code></li>
<li>with_label：筛选结果中保留哪些结果，可选以下三类, 默认为 <code>BOTH_LABEL</code>
<ul>
<li>SAME_LABEL：仅保留与源顶点相同类别的顶点</li>
<li>OTHER_LABEL：仅保留与源顶点不同类别（二分图的另一端）的顶点</li>
<li>BOTH_LABEL：同时保留与源顶点相同和相反类别的顶点</li>
</ul>
</li>
<li>limit: 返回的顶点的最大数目，默认为 <code>100</code></li>
<li>max_diff: 提前收敛的精度差, 默认为 <code>0.0001</code> (<em>后续实现</em>)</li>
<li>sorted：返回的结果是否根据 rank 排序，为 true 时降序排列，反之不排序，默认为 <code>true</code></li>
</ul>
<h5 id="4212-使用方法">4.2.1.2 使用方法</h5>
<h6 id="method--url">Method &amp; Url</h6>
<pre tabindex="0"><code>POST http://localhost:8080/graphs/hugegraph/traversers/personalrank
</code></pre><h6 id="request-body">Request Body</h6>
<div class="highlight"><pre tabindex="0" style="background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4;"><code class="language-json" data-lang="json"><span style="display:flex;"><span><span style="color:#000;font-weight:bold">{</span>
</span></span><span style="display:flex;"><span> <span style="color:#204a87;font-weight:bold">&#34;source&#34;</span><span style="color:#000;font-weight:bold">:</span> <span style="color:#4e9a06">&#34;1:1&#34;</span><span style="color:#000;font-weight:bold">,</span>
</span></span><span style="display:flex;"><span> <span style="color:#204a87;font-weight:bold">&#34;label&#34;</span><span style="color:#000;font-weight:bold">:</span> <span style="color:#4e9a06">&#34;rating&#34;</span><span style="color:#000;font-weight:bold">,</span>
</span></span><span style="display:flex;"><span> <span style="color:#204a87;font-weight:bold">&#34;alpha&#34;</span><span style="color:#000;font-weight:bold">:</span> <span style="color:#0000cf;font-weight:bold">0.6</span><span style="color:#000;font-weight:bold">,</span>
</span></span><span style="display:flex;"><span> <span style="color:#204a87;font-weight:bold">&#34;max_depth&#34;</span><span style="color:#000;font-weight:bold">:</span> <span style="color:#0000cf;font-weight:bold">15</span><span style="color:#000;font-weight:bold">,</span>
</span></span><span style="display:flex;"><span> <span style="color:#204a87;font-weight:bold">&#34;with_label&#34;</span><span style="color:#000;font-weight:bold">:</span> <span style="color:#4e9a06">&#34;OTHER_LABEL&#34;</span><span style="color:#000;font-weight:bold">,</span>
</span></span><span style="display:flex;"><span> <span style="color:#204a87;font-weight:bold">&#34;sorted&#34;</span><span style="color:#000;font-weight:bold">:</span> <span style="color:#204a87;font-weight:bold">true</span><span style="color:#000;font-weight:bold">,</span>
</span></span><span style="display:flex;"><span> <span style="color:#204a87;font-weight:bold">&#34;limit&#34;</span><span style="color:#000;font-weight:bold">:</span> <span style="color:#0000cf;font-weight:bold">10</span>
</span></span><span style="display:flex;"><span><span style="color:#000;font-weight:bold">}</span>
</span></span></code></pre></div><h6 id="response-status">Response Status</h6>
<div class="highlight"><pre tabindex="0" style="background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4;"><code class="language-json" data-lang="json"><span style="display:flex;"><span><span style="color:#0000cf;font-weight:bold">200</span>
</span></span></code></pre></div><h6 id="response-body">Response Body</h6>
<div class="highlight"><pre tabindex="0" style="background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4;"><code class="language-json" data-lang="json"><span style="display:flex;"><span><span style="color:#000;font-weight:bold">{</span>
</span></span><span style="display:flex;"><span> <span style="color:#204a87;font-weight:bold">&#34;2:2858&#34;</span><span style="color:#000;font-weight:bold">:</span> <span style="color:#0000cf;font-weight:bold">0.0005014026017816927</span><span style="color:#000;font-weight:bold">,</span>
</span></span><span style="display:flex;"><span> <span style="color:#204a87;font-weight:bold">&#34;2:1196&#34;</span><span style="color:#000;font-weight:bold">:</span> <span style="color:#0000cf;font-weight:bold">0.0004336708357653617</span><span style="color:#000;font-weight:bold">,</span>
</span></span><span style="display:flex;"><span> <span style="color:#204a87;font-weight:bold">&#34;2:1210&#34;</span><span style="color:#000;font-weight:bold">:</span> <span style="color:#0000cf;font-weight:bold">0.0004128083140214213</span><span style="color:#000;font-weight:bold">,</span>
</span></span><span style="display:flex;"><span> <span style="color:#204a87;font-weight:bold">&#34;2:593&#34;</span><span style="color:#000;font-weight:bold">:</span> <span style="color:#0000cf;font-weight:bold">0.00038117341069881513</span><span style="color:#000;font-weight:bold">,</span>
</span></span><span style="display:flex;"><span> <span style="color:#204a87;font-weight:bold">&#34;2:480&#34;</span><span style="color:#000;font-weight:bold">:</span> <span style="color:#0000cf;font-weight:bold">0.00037005373269728036</span><span style="color:#000;font-weight:bold">,</span>
</span></span><span style="display:flex;"><span> <span style="color:#204a87;font-weight:bold">&#34;2:1198&#34;</span><span style="color:#000;font-weight:bold">:</span> <span style="color:#0000cf;font-weight:bold">0.000366641614652057</span><span style="color:#000;font-weight:bold">,</span>
</span></span><span style="display:flex;"><span> <span style="color:#204a87;font-weight:bold">&#34;2:2396&#34;</span><span style="color:#000;font-weight:bold">:</span> <span style="color:#0000cf;font-weight:bold">0.0003622362410538888</span><span style="color:#000;font-weight:bold">,</span>
</span></span><span style="display:flex;"><span> <span style="color:#204a87;font-weight:bold">&#34;2:2571&#34;</span><span style="color:#000;font-weight:bold">:</span> <span style="color:#0000cf;font-weight:bold">0.0003593312457300953</span><span style="color:#000;font-weight:bold">,</span>
</span></span><span style="display:flex;"><span> <span style="color:#204a87;font-weight:bold">&#34;2:589&#34;</span><span style="color:#000;font-weight:bold">:</span> <span style="color:#0000cf;font-weight:bold">0.00035922123055598566</span><span style="color:#000;font-weight:bold">,</span>
</span></span><span style="display:flex;"><span> <span style="color:#204a87;font-weight:bold">&#34;2:110&#34;</span><span style="color:#000;font-weight:bold">:</span> <span style="color:#0000cf;font-weight:bold">0.0003466135844390885</span>
</span></span><span style="display:flex;"><span><span style="color:#000;font-weight:bold">}</span>
</span></span></code></pre></div><h5 id="4213-适用场景">4.2.1.3 适用场景</h5>
<p>两类不同顶点连接形成的二分图中，给某个点推荐相关性最高的其他顶点，例如：</p>
<ul>
<li>阅读推荐: 找出优先给某人推荐的其他<strong>书籍</strong>, 也可以同时推荐共同喜好最高的<strong>书友</strong> (例: 微信 &ldquo;你的好友也在看 xx 文章&rdquo; 功能)</li>
<li>社交推荐: 找出拥有相同关注话题的其他<strong>博主</strong>, 也可以推荐可能感兴趣的<strong>新闻/消息</strong> (例: Weibo 中的 &ldquo;热点推荐&rdquo; 功能)</li>
<li>商品推荐: 通过某人现在的购物习惯, 找出应优先推给它的<strong>商品列表</strong>, 也可以给它推荐<strong>带货</strong>播主 (例: TaoBao 的 &ldquo;猜你喜欢&rdquo; 功能)</li>
</ul>
<h4 id="422-neighbor-rank-api">4.2.2 Neighbor Rank API</h4>
<h5 id="4220-数据准备">4.2.2.0 数据准备</h5>
<div class="highlight"><pre tabindex="0" style="background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4;"><code class="language-java" data-lang="java"><span style="display:flex;"><span><span style="color:#204a87;font-weight:bold">public</span> <span style="color:#204a87;font-weight:bold">class</span> <span style="color:#000">Loader</span> <span style="color:#ce5c00;font-weight:bold">{</span>
</span></span><span style="display:flex;"><span> <span style="color:#204a87;font-weight:bold">public</span> <span style="color:#204a87;font-weight:bold">static</span> <span style="color:#204a87;font-weight:bold">void</span> <span style="color:#000">main</span><span style="color:#ce5c00;font-weight:bold">(</span><span style="color:#000">String</span><span style="color:#ce5c00;font-weight:bold">[]</span> <span style="color:#000">args</span><span style="color:#ce5c00;font-weight:bold">)</span> <span style="color:#ce5c00;font-weight:bold">{</span>
</span></span><span style="display:flex;"><span> <span style="color:#000">HugeClient</span> <span style="color:#000">client</span> <span style="color:#ce5c00;font-weight:bold">=</span> <span style="color:#204a87;font-weight:bold">new</span> <span style="color:#000">HugeClient</span><span style="color:#ce5c00;font-weight:bold">(</span><span style="color:#4e9a06">&#34;http://127.0.0.1:8080&#34;</span><span style="color:#ce5c00;font-weight:bold">,</span> <span style="color:#4e9a06">&#34;hugegraph&#34;</span><span style="color:#ce5c00;font-weight:bold">);</span>
</span></span><span style="display:flex;"><span> <span style="color:#000">SchemaManager</span> <span style="color:#000">schema</span> <span style="color:#ce5c00;font-weight:bold">=</span> <span style="color:#000">client</span><span style="color:#ce5c00;font-weight:bold">.</span><span style="color:#c4a000">schema</span><span style="color:#ce5c00;font-weight:bold">();</span>
</span></span><span style="display:flex;"><span>
</span></span><span style="display:flex;"><span> <span style="color:#000">schema</span><span style="color:#ce5c00;font-weight:bold">.</span><span style="color:#c4a000">propertyKey</span><span style="color:#ce5c00;font-weight:bold">(</span><span style="color:#4e9a06">&#34;name&#34;</span><span style="color:#ce5c00;font-weight:bold">).</span><span style="color:#c4a000">asText</span><span style="color:#ce5c00;font-weight:bold">().</span><span style="color:#c4a000">ifNotExist</span><span style="color:#ce5c00;font-weight:bold">().</span><span style="color:#c4a000">create</span><span style="color:#ce5c00;font-weight:bold">();</span>
</span></span><span style="display:flex;"><span>
</span></span><span style="display:flex;"><span> <span style="color:#000">schema</span><span style="color:#ce5c00;font-weight:bold">.</span><span style="color:#c4a000">vertexLabel</span><span style="color:#ce5c00;font-weight:bold">(</span><span style="color:#4e9a06">&#34;person&#34;</span><span style="color:#ce5c00;font-weight:bold">)</span>
</span></span><span style="display:flex;"><span> <span style="color:#ce5c00;font-weight:bold">.</span><span style="color:#c4a000">properties</span><span style="color:#ce5c00;font-weight:bold">(</span><span style="color:#4e9a06">&#34;name&#34;</span><span style="color:#ce5c00;font-weight:bold">)</span>
</span></span><span style="display:flex;"><span> <span style="color:#ce5c00;font-weight:bold">.</span><span style="color:#c4a000">useCustomizeStringId</span><span style="color:#ce5c00;font-weight:bold">()</span>
</span></span><span style="display:flex;"><span> <span style="color:#ce5c00;font-weight:bold">.</span><span style="color:#c4a000">ifNotExist</span><span style="color:#ce5c00;font-weight:bold">()</span>
</span></span><span style="display:flex;"><span> <span style="color:#ce5c00;font-weight:bold">.</span><span style="color:#c4a000">create</span><span style="color:#ce5c00;font-weight:bold">();</span>
</span></span><span style="display:flex;"><span>
</span></span><span style="display:flex;"><span> <span style="color:#000">schema</span><span style="color:#ce5c00;font-weight:bold">.</span><span style="color:#c4a000">vertexLabel</span><span style="color:#ce5c00;font-weight:bold">(</span><span style="color:#4e9a06">&#34;movie&#34;</span><span style="color:#ce5c00;font-weight:bold">)</span>
</span></span><span style="display:flex;"><span> <span style="color:#ce5c00;font-weight:bold">.</span><span style="color:#c4a000">properties</span><span style="color:#ce5c00;font-weight:bold">(</span><span style="color:#4e9a06">&#34;name&#34;</span><span style="color:#ce5c00;font-weight:bold">)</span>
</span></span><span style="display:flex;"><span> <span style="color:#ce5c00;font-weight:bold">.</span><span style="color:#c4a000">useCustomizeStringId</span><span style="color:#ce5c00;font-weight:bold">()</span>
</span></span><span style="display:flex;"><span> <span style="color:#ce5c00;font-weight:bold">.</span><span style="color:#c4a000">ifNotExist</span><span style="color:#ce5c00;font-weight:bold">()</span>
</span></span><span style="display:flex;"><span> <span style="color:#ce5c00;font-weight:bold">.</span><span style="color:#c4a000">create</span><span style="color:#ce5c00;font-weight:bold">();</span>
</span></span><span style="display:flex;"><span>
</span></span><span style="display:flex;"><span> <span style="color:#000">schema</span><span style="color:#ce5c00;font-weight:bold">.</span><span style="color:#c4a000">edgeLabel</span><span style="color:#ce5c00;font-weight:bold">(</span><span style="color:#4e9a06">&#34;follow&#34;</span><span style="color:#ce5c00;font-weight:bold">)</span>
</span></span><span style="display:flex;"><span> <span style="color:#ce5c00;font-weight:bold">.</span><span style="color:#c4a000">sourceLabel</span><span style="color:#ce5c00;font-weight:bold">(</span><span style="color:#4e9a06">&#34;person&#34;</span><span style="color:#ce5c00;font-weight:bold">)</span>
</span></span><span style="display:flex;"><span> <span style="color:#ce5c00;font-weight:bold">.</span><span style="color:#c4a000">targetLabel</span><span style="color:#ce5c00;font-weight:bold">(</span><span style="color:#4e9a06">&#34;person&#34;</span><span style="color:#ce5c00;font-weight:bold">)</span>
</span></span><span style="display:flex;"><span> <span style="color:#ce5c00;font-weight:bold">.</span><span style="color:#c4a000">ifNotExist</span><span style="color:#ce5c00;font-weight:bold">()</span>
</span></span><span style="display:flex;"><span> <span style="color:#ce5c00;font-weight:bold">.</span><span style="color:#c4a000">create</span><span style="color:#ce5c00;font-weight:bold">();</span>
</span></span><span style="display:flex;"><span>
</span></span><span style="display:flex;"><span> <span style="color:#000">schema</span><span style="color:#ce5c00;font-weight:bold">.</span><span style="color:#c4a000">edgeLabel</span><span style="color:#ce5c00;font-weight:bold">(</span><span style="color:#4e9a06">&#34;like&#34;</span><span style="color:#ce5c00;font-weight:bold">)</span>
</span></span><span style="display:flex;"><span> <span style="color:#ce5c00;font-weight:bold">.</span><span style="color:#c4a000">sourceLabel</span><span style="color:#ce5c00;font-weight:bold">(</span><span style="color:#4e9a06">&#34;person&#34;</span><span style="color:#ce5c00;font-weight:bold">)</span>
</span></span><span style="display:flex;"><span> <span style="color:#ce5c00;font-weight:bold">.</span><span style="color:#c4a000">targetLabel</span><span style="color:#ce5c00;font-weight:bold">(</span><span style="color:#4e9a06">&#34;movie&#34;</span><span style="color:#ce5c00;font-weight:bold">)</span>
</span></span><span style="display:flex;"><span> <span style="color:#ce5c00;font-weight:bold">.</span><span style="color:#c4a000">ifNotExist</span><span style="color:#ce5c00;font-weight:bold">()</span>
</span></span><span style="display:flex;"><span> <span style="color:#ce5c00;font-weight:bold">.</span><span style="color:#c4a000">create</span><span style="color:#ce5c00;font-weight:bold">();</span>
</span></span><span style="display:flex;"><span>
</span></span><span style="display:flex;"><span> <span style="color:#000">schema</span><span style="color:#ce5c00;font-weight:bold">.</span><span style="color:#c4a000">edgeLabel</span><span style="color:#ce5c00;font-weight:bold">(</span><span style="color:#4e9a06">&#34;directedBy&#34;</span><span style="color:#ce5c00;font-weight:bold">)</span>
</span></span><span style="display:flex;"><span> <span style="color:#ce5c00;font-weight:bold">.</span><span style="color:#c4a000">sourceLabel</span><span style="color:#ce5c00;font-weight:bold">(</span><span style="color:#4e9a06">&#34;movie&#34;</span><span style="color:#ce5c00;font-weight:bold">)</span>
</span></span><span style="display:flex;"><span> <span style="color:#ce5c00;font-weight:bold">.</span><span style="color:#c4a000">targetLabel</span><span style="color:#ce5c00;font-weight:bold">(</span><span style="color:#4e9a06">&#34;person&#34;</span><span style="color:#ce5c00;font-weight:bold">)</span>
</span></span><span style="display:flex;"><span> <span style="color:#ce5c00;font-weight:bold">.</span><span style="color:#c4a000">ifNotExist</span><span style="color:#ce5c00;font-weight:bold">()</span>
</span></span><span style="display:flex;"><span> <span style="color:#ce5c00;font-weight:bold">.</span><span style="color:#c4a000">create</span><span style="color:#ce5c00;font-weight:bold">();</span>
</span></span><span style="display:flex;"><span>
</span></span><span style="display:flex;"><span> <span style="color:#000">GraphManager</span> <span style="color:#000">graph</span> <span style="color:#ce5c00;font-weight:bold">=</span> <span style="color:#000">client</span><span style="color:#ce5c00;font-weight:bold">.</span><span style="color:#c4a000">graph</span><span style="color:#ce5c00;font-weight:bold">();</span>
</span></span><span style="display:flex;"><span>
</span></span><span style="display:flex;"><span> <span style="color:#000">Vertex</span> <span style="color:#000">O</span> <span style="color:#ce5c00;font-weight:bold">=</span> <span style="color:#000">graph</span><span style="color:#ce5c00;font-weight:bold">.</span><span style="color:#c4a000">addVertex</span><span style="color:#ce5c00;font-weight:bold">(</span><span style="color:#000">T</span><span style="color:#ce5c00;font-weight:bold">.</span><span style="color:#c4a000">label</span><span style="color:#ce5c00;font-weight:bold">,</span> <span style="color:#4e9a06">&#34;person&#34;</span><span style="color:#ce5c00;font-weight:bold">,</span> <span style="color:#000">T</span><span style="color:#ce5c00;font-weight:bold">.</span><span style="color:#c4a000">id</span><span style="color:#ce5c00;font-weight:bold">,</span> <span style="color:#4e9a06">&#34;O&#34;</span><span style="color:#ce5c00;font-weight:bold">,</span> <span style="color:#4e9a06">&#34;name&#34;</span><span style="color:#ce5c00;font-weight:bold">,</span> <span style="color:#4e9a06">&#34;O&#34;</span><span style="color:#ce5c00;font-weight:bold">);</span>
</span></span><span style="display:flex;"><span>
</span></span><span style="display:flex;"><span> <span style="color:#000">Vertex</span> <span style="color:#000">A</span> <span style="color:#ce5c00;font-weight:bold">=</span> <span style="color:#000">graph</span><span style="color:#ce5c00;font-weight:bold">.</span><span style="color:#c4a000">addVertex</span><span style="color:#ce5c00;font-weight:bold">(</span><span style="color:#000">T</span><span style="color:#ce5c00;font-weight:bold">.</span><span style="color:#c4a000">label</span><span style="color:#ce5c00;font-weight:bold">,</span> <span style="color:#4e9a06">&#34;person&#34;</span><span style="color:#ce5c00;font-weight:bold">,</span> <span style="color:#000">T</span><span style="color:#ce5c00;font-weight:bold">.</span><span style="color:#c4a000">id</span><span style="color:#ce5c00;font-weight:bold">,</span> <span style="color:#4e9a06">&#34;A&#34;</span><span style="color:#ce5c00;font-weight:bold">,</span> <span style="color:#4e9a06">&#34;name&#34;</span><span style="color:#ce5c00;font-weight:bold">,</span> <span style="color:#4e9a06">&#34;A&#34;</span><span style="color:#ce5c00;font-weight:bold">);</span>
</span></span><span style="display:flex;"><span> <span style="color:#000">Vertex</span> <span style="color:#000">B</span> <span style="color:#ce5c00;font-weight:bold">=</span> <span style="color:#000">graph</span><span style="color:#ce5c00;font-weight:bold">.</span><span style="color:#c4a000">addVertex</span><span style="color:#ce5c00;font-weight:bold">(</span><span style="color:#000">T</span><span style="color:#ce5c00;font-weight:bold">.</span><span style="color:#c4a000">label</span><span style="color:#ce5c00;font-weight:bold">,</span> <span style="color:#4e9a06">&#34;person&#34;</span><span style="color:#ce5c00;font-weight:bold">,</span> <span style="color:#000">T</span><span style="color:#ce5c00;font-weight:bold">.</span><span style="color:#c4a000">id</span><span style="color:#ce5c00;font-weight:bold">,</span> <span style="color:#4e9a06">&#34;B&#34;</span><span style="color:#ce5c00;font-weight:bold">,</span> <span style="color:#4e9a06">&#34;name&#34;</span><span style="color:#ce5c00;font-weight:bold">,</span> <span style="color:#4e9a06">&#34;B&#34;</span><span style="color:#ce5c00;font-weight:bold">);</span>
</span></span><span style="display:flex;"><span> <span style="color:#000">Vertex</span> <span style="color:#000">C</span> <span style="color:#ce5c00;font-weight:bold">=</span> <span style="color:#000">graph</span><span style="color:#ce5c00;font-weight:bold">.</span><span style="color:#c4a000">addVertex</span><span style="color:#ce5c00;font-weight:bold">(</span><span style="color:#000">T</span><span style="color:#ce5c00;font-weight:bold">.</span><span style="color:#c4a000">label</span><span style="color:#ce5c00;font-weight:bold">,</span> <span style="color:#4e9a06">&#34;person&#34;</span><span style="color:#ce5c00;font-weight:bold">,</span> <span style="color:#000">T</span><span style="color:#ce5c00;font-weight:bold">.</span><span style="color:#c4a000">id</span><span style="color:#ce5c00;font-weight:bold">,</span> <span style="color:#4e9a06">&#34;C&#34;</span><span style="color:#ce5c00;font-weight:bold">,</span> <span style="color:#4e9a06">&#34;name&#34;</span><span style="color:#ce5c00;font-weight:bold">,</span> <span style="color:#4e9a06">&#34;C&#34;</span><span style="color:#ce5c00;font-weight:bold">);</span>
</span></span><span style="display:flex;"><span> <span style="color:#000">Vertex</span> <span style="color:#000">D</span> <span style="color:#ce5c00;font-weight:bold">=</span> <span style="color:#000">graph</span><span style="color:#ce5c00;font-weight:bold">.</span><span style="color:#c4a000">addVertex</span><span style="color:#ce5c00;font-weight:bold">(</span><span style="color:#000">T</span><span style="color:#ce5c00;font-weight:bold">.</span><span style="color:#c4a000">label</span><span style="color:#ce5c00;font-weight:bold">,</span> <span style="color:#4e9a06">&#34;person&#34;</span><span style="color:#ce5c00;font-weight:bold">,</span> <span style="color:#000">T</span><span style="color:#ce5c00;font-weight:bold">.</span><span style="color:#c4a000">id</span><span style="color:#ce5c00;font-weight:bold">,</span> <span style="color:#4e9a06">&#34;D&#34;</span><span style="color:#ce5c00;font-weight:bold">,</span> <span style="color:#4e9a06">&#34;name&#34;</span><span style="color:#ce5c00;font-weight:bold">,</span> <span style="color:#4e9a06">&#34;D&#34;</span><span style="color:#ce5c00;font-weight:bold">);</span>
</span></span><span style="display:flex;"><span>
</span></span><span style="display:flex;"><span> <span style="color:#000">Vertex</span> <span style="color:#000">E</span> <span style="color:#ce5c00;font-weight:bold">=</span> <span style="color:#000">graph</span><span style="color:#ce5c00;font-weight:bold">.</span><span style="color:#c4a000">addVertex</span><span style="color:#ce5c00;font-weight:bold">(</span><span style="color:#000">T</span><span style="color:#ce5c00;font-weight:bold">.</span><span style="color:#c4a000">label</span><span style="color:#ce5c00;font-weight:bold">,</span> <span style="color:#4e9a06">&#34;movie&#34;</span><span style="color:#ce5c00;font-weight:bold">,</span> <span style="color:#000">T</span><span style="color:#ce5c00;font-weight:bold">.</span><span style="color:#c4a000">id</span><span style="color:#ce5c00;font-weight:bold">,</span> <span style="color:#4e9a06">&#34;E&#34;</span><span style="color:#ce5c00;font-weight:bold">,</span> <span style="color:#4e9a06">&#34;name&#34;</span><span style="color:#ce5c00;font-weight:bold">,</span> <span style="color:#4e9a06">&#34;E&#34;</span><span style="color:#ce5c00;font-weight:bold">);</span>
</span></span><span style="display:flex;"><span> <span style="color:#000">Vertex</span> <span style="color:#000">F</span> <span style="color:#ce5c00;font-weight:bold">=</span> <span style="color:#000">graph</span><span style="color:#ce5c00;font-weight:bold">.</span><span style="color:#c4a000">addVertex</span><span style="color:#ce5c00;font-weight:bold">(</span><span style="color:#000">T</span><span style="color:#ce5c00;font-weight:bold">.</span><span style="color:#c4a000">label</span><span style="color:#ce5c00;font-weight:bold">,</span> <span style="color:#4e9a06">&#34;movie&#34;</span><span style="color:#ce5c00;font-weight:bold">,</span> <span style="color:#000">T</span><span style="color:#ce5c00;font-weight:bold">.</span><span style="color:#c4a000">id</span><span style="color:#ce5c00;font-weight:bold">,</span> <span style="color:#4e9a06">&#34;F&#34;</span><span style="color:#ce5c00;font-weight:bold">,</span> <span style="color:#4e9a06">&#34;name&#34;</span><span style="color:#ce5c00;font-weight:bold">,</span> <span style="color:#4e9a06">&#34;F&#34;</span><span style="color:#ce5c00;font-weight:bold">);</span>
</span></span><span style="display:flex;"><span> <span style="color:#000">Vertex</span> <span style="color:#000">G</span> <span style="color:#ce5c00;font-weight:bold">=</span> <span style="color:#000">graph</span><span style="color:#ce5c00;font-weight:bold">.</span><span style="color:#c4a000">addVertex</span><span style="color:#ce5c00;font-weight:bold">(</span><span style="color:#000">T</span><span style="color:#ce5c00;font-weight:bold">.</span><span style="color:#c4a000">label</span><span style="color:#ce5c00;font-weight:bold">,</span> <span style="color:#4e9a06">&#34;movie&#34;</span><span style="color:#ce5c00;font-weight:bold">,</span> <span style="color:#000">T</span><span style="color:#ce5c00;font-weight:bold">.</span><span style="color:#c4a000">id</span><span style="color:#ce5c00;font-weight:bold">,</span> <span style="color:#4e9a06">&#34;G&#34;</span><span style="color:#ce5c00;font-weight:bold">,</span> <span style="color:#4e9a06">&#34;name&#34;</span><span style="color:#ce5c00;font-weight:bold">,</span> <span style="color:#4e9a06">&#34;G&#34;</span><span style="color:#ce5c00;font-weight:bold">);</span>
</span></span><span style="display:flex;"><span> <span style="color:#000">Vertex</span> <span style="color:#000">H</span> <span style="color:#ce5c00;font-weight:bold">=</span> <span style="color:#000">graph</span><span style="color:#ce5c00;font-weight:bold">.</span><span style="color:#c4a000">addVertex</span><span style="color:#ce5c00;font-weight:bold">(</span><span style="color:#000">T</span><span style="color:#ce5c00;font-weight:bold">.</span><span style="color:#c4a000">label</span><span style="color:#ce5c00;font-weight:bold">,</span> <span style="color:#4e9a06">&#34;movie&#34;</span><span style="color:#ce5c00;font-weight:bold">,</span> <span style="color:#000">T</span><span style="color:#ce5c00;font-weight:bold">.</span><span style="color:#c4a000">id</span><span style="color:#ce5c00;font-weight:bold">,</span> <span style="color:#4e9a06">&#34;H&#34;</span><span style="color:#ce5c00;font-weight:bold">,</span> <span style="color:#4e9a06">&#34;name&#34;</span><span style="color:#ce5c00;font-weight:bold">,</span> <span style="color:#4e9a06">&#34;H&#34;</span><span style="color:#ce5c00;font-weight:bold">);</span>
</span></span><span style="display:flex;"><span> <span style="color:#000">Vertex</span> <span style="color:#000">I</span> <span style="color:#ce5c00;font-weight:bold">=</span> <span style="color:#000">graph</span><span style="color:#ce5c00;font-weight:bold">.</span><span style="color:#c4a000">addVertex</span><span style="color:#ce5c00;font-weight:bold">(</span><span style="color:#000">T</span><span style="color:#ce5c00;font-weight:bold">.</span><span style="color:#c4a000">label</span><span style="color:#ce5c00;font-weight:bold">,</span> <span style="color:#4e9a06">&#34;movie&#34;</span><span style="color:#ce5c00;font-weight:bold">,</span> <span style="color:#000">T</span><span style="color:#ce5c00;font-weight:bold">.</span><span style="color:#c4a000">id</span><span style="color:#ce5c00;font-weight:bold">,</span> <span style="color:#4e9a06">&#34;I&#34;</span><span style="color:#ce5c00;font-weight:bold">,</span> <span style="color:#4e9a06">&#34;name&#34;</span><span style="color:#ce5c00;font-weight:bold">,</span> <span style="color:#4e9a06">&#34;I&#34;</span><span style="color:#ce5c00;font-weight:bold">);</span>
</span></span><span style="display:flex;"><span> <span style="color:#000">Vertex</span> <span style="color:#000">J</span> <span style="color:#ce5c00;font-weight:bold">=</span> <span style="color:#000">graph</span><span style="color:#ce5c00;font-weight:bold">.</span><span style="color:#c4a000">addVertex</span><span style="color:#ce5c00;font-weight:bold">(</span><span style="color:#000">T</span><span style="color:#ce5c00;font-weight:bold">.</span><span style="color:#c4a000">label</span><span style="color:#ce5c00;font-weight:bold">,</span> <span style="color:#4e9a06">&#34;movie&#34;</span><span style="color:#ce5c00;font-weight:bold">,</span> <span style="color:#000">T</span><span style="color:#ce5c00;font-weight:bold">.</span><span style="color:#c4a000">id</span><span style="color:#ce5c00;font-weight:bold">,</span> <span style="color:#4e9a06">&#34;J&#34;</span><span style="color:#ce5c00;font-weight:bold">,</span> <span style="color:#4e9a06">&#34;name&#34;</span><span style="color:#ce5c00;font-weight:bold">,</span> <span style="color:#4e9a06">&#34;J&#34;</span><span style="color:#ce5c00;font-weight:bold">);</span>
</span></span><span style="display:flex;"><span>
</span></span><span style="display:flex;"><span> <span style="color:#000">Vertex</span> <span style="color:#000">K</span> <span style="color:#ce5c00;font-weight:bold">=</span> <span style="color:#000">graph</span><span style="color:#ce5c00;font-weight:bold">.</span><span style="color:#c4a000">addVertex</span><span style="color:#ce5c00;font-weight:bold">(</span><span style="color:#000">T</span><span style="color:#ce5c00;font-weight:bold">.</span><span style="color:#c4a000">label</span><span style="color:#ce5c00;font-weight:bold">,</span> <span style="color:#4e9a06">&#34;person&#34;</span><span style="color:#ce5c00;font-weight:bold">,</span> <span style="color:#000">T</span><span style="color:#ce5c00;font-weight:bold">.</span><span style="color:#c4a000">id</span><span style="color:#ce5c00;font-weight:bold">,</span> <span style="color:#4e9a06">&#34;K&#34;</span><span style="color:#ce5c00;font-weight:bold">,</span> <span style="color:#4e9a06">&#34;name&#34;</span><span style="color:#ce5c00;font-weight:bold">,</span> <span style="color:#4e9a06">&#34;K&#34;</span><span style="color:#ce5c00;font-weight:bold">);</span>
</span></span><span style="display:flex;"><span> <span style="color:#000">Vertex</span> <span style="color:#000">L</span> <span style="color:#ce5c00;font-weight:bold">=</span> <span style="color:#000">graph</span><span style="color:#ce5c00;font-weight:bold">.</span><span style="color:#c4a000">addVertex</span><span style="color:#ce5c00;font-weight:bold">(</span><span style="color:#000">T</span><span style="color:#ce5c00;font-weight:bold">.</span><span style="color:#c4a000">label</span><span style="color:#ce5c00;font-weight:bold">,</span> <span style="color:#4e9a06">&#34;person&#34;</span><span style="color:#ce5c00;font-weight:bold">,</span> <span style="color:#000">T</span><span style="color:#ce5c00;font-weight:bold">.</span><span style="color:#c4a000">id</span><span style="color:#ce5c00;font-weight:bold">,</span> <span style="color:#4e9a06">&#34;L&#34;</span><span style="color:#ce5c00;font-weight:bold">,</span> <span style="color:#4e9a06">&#34;name&#34;</span><span style="color:#ce5c00;font-weight:bold">,</span> <span style="color:#4e9a06">&#34;L&#34;</span><span style="color:#ce5c00;font-weight:bold">);</span>
</span></span><span style="display:flex;"><span> <span style="color:#000">Vertex</span> <span style="color:#000">M</span> <span style="color:#ce5c00;font-weight:bold">=</span> <span style="color:#000">graph</span><span style="color:#ce5c00;font-weight:bold">.</span><span style="color:#c4a000">addVertex</span><span style="color:#ce5c00;font-weight:bold">(</span><span style="color:#000">T</span><span style="color:#ce5c00;font-weight:bold">.</span><span style="color:#c4a000">label</span><span style="color:#ce5c00;font-weight:bold">,</span> <span style="color:#4e9a06">&#34;person&#34;</span><span style="color:#ce5c00;font-weight:bold">,</span> <span style="color:#000">T</span><span style="color:#ce5c00;font-weight:bold">.</span><span style="color:#c4a000">id</span><span style="color:#ce5c00;font-weight:bold">,</span> <span style="color:#4e9a06">&#34;M&#34;</span><span style="color:#ce5c00;font-weight:bold">,</span> <span style="color:#4e9a06">&#34;name&#34;</span><span style="color:#ce5c00;font-weight:bold">,</span> <span style="color:#4e9a06">&#34;M&#34;</span><span style="color:#ce5c00;font-weight:bold">);</span>
</span></span><span style="display:flex;"><span>
</span></span><span style="display:flex;"><span> <span style="color:#000">O</span><span style="color:#ce5c00;font-weight:bold">.</span><span style="color:#c4a000">addEdge</span><span style="color:#ce5c00;font-weight:bold">(</span><span style="color:#4e9a06">&#34;follow&#34;</span><span style="color:#ce5c00;font-weight:bold">,</span> <span style="color:#000">A</span><span style="color:#ce5c00;font-weight:bold">);</span>
</span></span><span style="display:flex;"><span> <span style="color:#000">O</span><span style="color:#ce5c00;font-weight:bold">.</span><span style="color:#c4a000">addEdge</span><span style="color:#ce5c00;font-weight:bold">(</span><span style="color:#4e9a06">&#34;follow&#34;</span><span style="color:#ce5c00;font-weight:bold">,</span> <span style="color:#000">B</span><span style="color:#ce5c00;font-weight:bold">);</span>
</span></span><span style="display:flex;"><span> <span style="color:#000">O</span><span style="color:#ce5c00;font-weight:bold">.</span><span style="color:#c4a000">addEdge</span><span style="color:#ce5c00;font-weight:bold">(</span><span style="color:#4e9a06">&#34;follow&#34;</span><span style="color:#ce5c00;font-weight:bold">,</span> <span style="color:#000">C</span><span style="color:#ce5c00;font-weight:bold">);</span>
</span></span><span style="display:flex;"><span> <span style="color:#000">D</span><span style="color:#ce5c00;font-weight:bold">.</span><span style="color:#c4a000">addEdge</span><span style="color:#ce5c00;font-weight:bold">(</span><span style="color:#4e9a06">&#34;follow&#34;</span><span style="color:#ce5c00;font-weight:bold">,</span> <span style="color:#000">O</span><span style="color:#ce5c00;font-weight:bold">);</span>
</span></span><span style="display:flex;"><span>
</span></span><span style="display:flex;"><span> <span style="color:#000">A</span><span style="color:#ce5c00;font-weight:bold">.</span><span style="color:#c4a000">addEdge</span><span style="color:#ce5c00;font-weight:bold">(</span><span style="color:#4e9a06">&#34;follow&#34;</span><span style="color:#ce5c00;font-weight:bold">,</span> <span style="color:#000">B</span><span style="color:#ce5c00;font-weight:bold">);</span>
</span></span><span style="display:flex;"><span> <span style="color:#000">A</span><span style="color:#ce5c00;font-weight:bold">.</span><span style="color:#c4a000">addEdge</span><span style="color:#ce5c00;font-weight:bold">(</span><span style="color:#4e9a06">&#34;like&#34;</span><span style="color:#ce5c00;font-weight:bold">,</span> <span style="color:#000">E</span><span style="color:#ce5c00;font-weight:bold">);</span>
</span></span><span style="display:flex;"><span> <span style="color:#000">A</span><span style="color:#ce5c00;font-weight:bold">.</span><span style="color:#c4a000">addEdge</span><span style="color:#ce5c00;font-weight:bold">(</span><span style="color:#4e9a06">&#34;like&#34;</span><span style="color:#ce5c00;font-weight:bold">,</span> <span style="color:#000">F</span><span style="color:#ce5c00;font-weight:bold">);</span>
</span></span><span style="display:flex;"><span>
</span></span><span style="display:flex;"><span> <span style="color:#000">B</span><span style="color:#ce5c00;font-weight:bold">.</span><span style="color:#c4a000">addEdge</span><span style="color:#ce5c00;font-weight:bold">(</span><span style="color:#4e9a06">&#34;like&#34;</span><span style="color:#ce5c00;font-weight:bold">,</span> <span style="color:#000">G</span><span style="color:#ce5c00;font-weight:bold">);</span>
</span></span><span style="display:flex;"><span> <span style="color:#000">B</span><span style="color:#ce5c00;font-weight:bold">.</span><span style="color:#c4a000">addEdge</span><span style="color:#ce5c00;font-weight:bold">(</span><span style="color:#4e9a06">&#34;like&#34;</span><span style="color:#ce5c00;font-weight:bold">,</span> <span style="color:#000">H</span><span style="color:#ce5c00;font-weight:bold">);</span>
</span></span><span style="display:flex;"><span>
</span></span><span style="display:flex;"><span> <span style="color:#000">C</span><span style="color:#ce5c00;font-weight:bold">.</span><span style="color:#c4a000">addEdge</span><span style="color:#ce5c00;font-weight:bold">(</span><span style="color:#4e9a06">&#34;like&#34;</span><span style="color:#ce5c00;font-weight:bold">,</span> <span style="color:#000">I</span><span style="color:#ce5c00;font-weight:bold">);</span>
</span></span><span style="display:flex;"><span> <span style="color:#000">C</span><span style="color:#ce5c00;font-weight:bold">.</span><span style="color:#c4a000">addEdge</span><span style="color:#ce5c00;font-weight:bold">(</span><span style="color:#4e9a06">&#34;like&#34;</span><span style="color:#ce5c00;font-weight:bold">,</span> <span style="color:#000">J</span><span style="color:#ce5c00;font-weight:bold">);</span>
</span></span><span style="display:flex;"><span>
</span></span><span style="display:flex;"><span> <span style="color:#000">E</span><span style="color:#ce5c00;font-weight:bold">.</span><span style="color:#c4a000">addEdge</span><span style="color:#ce5c00;font-weight:bold">(</span><span style="color:#4e9a06">&#34;directedBy&#34;</span><span style="color:#ce5c00;font-weight:bold">,</span> <span style="color:#000">K</span><span style="color:#ce5c00;font-weight:bold">);</span>
</span></span><span style="display:flex;"><span> <span style="color:#000">F</span><span style="color:#ce5c00;font-weight:bold">.</span><span style="color:#c4a000">addEdge</span><span style="color:#ce5c00;font-weight:bold">(</span><span style="color:#4e9a06">&#34;directedBy&#34;</span><span style="color:#ce5c00;font-weight:bold">,</span> <span style="color:#000">B</span><span style="color:#ce5c00;font-weight:bold">);</span>
</span></span><span style="display:flex;"><span> <span style="color:#000">F</span><span style="color:#ce5c00;font-weight:bold">.</span><span style="color:#c4a000">addEdge</span><span style="color:#ce5c00;font-weight:bold">(</span><span style="color:#4e9a06">&#34;directedBy&#34;</span><span style="color:#ce5c00;font-weight:bold">,</span> <span style="color:#000">L</span><span style="color:#ce5c00;font-weight:bold">);</span>
</span></span><span style="display:flex;"><span>
</span></span><span style="display:flex;"><span> <span style="color:#000">G</span><span style="color:#ce5c00;font-weight:bold">.</span><span style="color:#c4a000">addEdge</span><span style="color:#ce5c00;font-weight:bold">(</span><span style="color:#4e9a06">&#34;directedBy&#34;</span><span style="color:#ce5c00;font-weight:bold">,</span> <span style="color:#000">M</span><span style="color:#ce5c00;font-weight:bold">);</span>
</span></span><span style="display:flex;"><span> <span style="color:#ce5c00;font-weight:bold">}</span>
</span></span><span style="display:flex;"><span><span style="color:#ce5c00;font-weight:bold">}</span>
</span></span></code></pre></div><h5 id="4221-功能介绍">4.2.2.1 功能介绍</h5>
<p>在一般图结构中，找出每一层与给定起点相关性最高的前 N 个顶点及其相关度，用图的语义理解就是：从起点往外走，
走到各层各个顶点的概率。</p>
<h6 id="params-1">Params</h6>
<ul>
<li>source: 源顶点 id，必填项</li>
<li>alpha：每轮迭代时从某个点往外走的概率，与 PageRank 算法中的 alpha 类似，必填项，取值区间为 (0, 1]</li>
<li>steps: 表示从起始顶点走过的路径规则，是一组 Step 的列表，每个 Step 对应结果中的一层，必填项。每个 Step 的结构如下：
<ul>
<li>direction：表示边的方向（OUT, IN, BOTH），默认是 BOTH</li>
<li>labels：边的类型列表，多个边类型取并集</li>
<li>max_degree：查询过程中，单个顶点遍历的最大邻接边数目，默认为 10000 (注: 0.12版之前 step 内仅支持 degree 作为参数名, 0.12开始统一使用 max_degree, 并向下兼容 degree 写法)</li>
<li>top：在结果中每一层只保留权重最高的前 N 个结果，默认为 100，最大值为 1000</li>
</ul>
</li>
<li>capacity: 遍历过程中最大的访问的顶点数目，选填项，默认为10000000</li>
</ul>
<h5 id="4222-使用方法">4.2.2.2 使用方法</h5>
<h6 id="method--url-1">Method &amp; Url</h6>
<pre tabindex="0"><code>POST http://localhost:8080/graphs/hugegraph/traversers/neighborrank
</code></pre><h6 id="request-body-1">Request Body</h6>
<div class="highlight"><pre tabindex="0" style="background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4;"><code class="language-json" data-lang="json"><span style="display:flex;"><span><span style="color:#000;font-weight:bold">{</span>
</span></span><span style="display:flex;"><span> <span style="color:#204a87;font-weight:bold">&#34;source&#34;</span><span style="color:#000;font-weight:bold">:</span><span style="color:#4e9a06">&#34;O&#34;</span><span style="color:#000;font-weight:bold">,</span>
</span></span><span style="display:flex;"><span> <span style="color:#204a87;font-weight:bold">&#34;steps&#34;</span><span style="color:#000;font-weight:bold">:[</span>
</span></span><span style="display:flex;"><span> <span style="color:#000;font-weight:bold">{</span>
</span></span><span style="display:flex;"><span> <span style="color:#204a87;font-weight:bold">&#34;direction&#34;</span><span style="color:#000;font-weight:bold">:</span><span style="color:#4e9a06">&#34;OUT&#34;</span><span style="color:#000;font-weight:bold">,</span>
</span></span><span style="display:flex;"><span> <span style="color:#204a87;font-weight:bold">&#34;labels&#34;</span><span style="color:#000;font-weight:bold">:[</span>
</span></span><span style="display:flex;"><span> <span style="color:#4e9a06">&#34;follow&#34;</span>
</span></span><span style="display:flex;"><span> <span style="color:#000;font-weight:bold">],</span>
</span></span><span style="display:flex;"><span> <span style="color:#204a87;font-weight:bold">&#34;max_degree&#34;</span><span style="color:#000;font-weight:bold">:</span><span style="color:#0000cf;font-weight:bold">-1</span><span style="color:#000;font-weight:bold">,</span>
</span></span><span style="display:flex;"><span> <span style="color:#204a87;font-weight:bold">&#34;top&#34;</span><span style="color:#000;font-weight:bold">:</span><span style="color:#0000cf;font-weight:bold">100</span>
</span></span><span style="display:flex;"><span> <span style="color:#000;font-weight:bold">},</span>
</span></span><span style="display:flex;"><span> <span style="color:#000;font-weight:bold">{</span>
</span></span><span style="display:flex;"><span> <span style="color:#204a87;font-weight:bold">&#34;direction&#34;</span><span style="color:#000;font-weight:bold">:</span><span style="color:#4e9a06">&#34;OUT&#34;</span><span style="color:#000;font-weight:bold">,</span>
</span></span><span style="display:flex;"><span> <span style="color:#204a87;font-weight:bold">&#34;labels&#34;</span><span style="color:#000;font-weight:bold">:[</span>
</span></span><span style="display:flex;"><span> <span style="color:#4e9a06">&#34;follow&#34;</span><span style="color:#000;font-weight:bold">,</span>
</span></span><span style="display:flex;"><span> <span style="color:#4e9a06">&#34;like&#34;</span>
</span></span><span style="display:flex;"><span> <span style="color:#000;font-weight:bold">],</span>
</span></span><span style="display:flex;"><span> <span style="color:#204a87;font-weight:bold">&#34;max_degree&#34;</span><span style="color:#000;font-weight:bold">:</span><span style="color:#0000cf;font-weight:bold">-1</span><span style="color:#000;font-weight:bold">,</span>
</span></span><span style="display:flex;"><span> <span style="color:#204a87;font-weight:bold">&#34;top&#34;</span><span style="color:#000;font-weight:bold">:</span><span style="color:#0000cf;font-weight:bold">100</span>
</span></span><span style="display:flex;"><span> <span style="color:#000;font-weight:bold">},</span>
</span></span><span style="display:flex;"><span> <span style="color:#000;font-weight:bold">{</span>
</span></span><span style="display:flex;"><span> <span style="color:#204a87;font-weight:bold">&#34;direction&#34;</span><span style="color:#000;font-weight:bold">:</span><span style="color:#4e9a06">&#34;OUT&#34;</span><span style="color:#000;font-weight:bold">,</span>
</span></span><span style="display:flex;"><span> <span style="color:#204a87;font-weight:bold">&#34;labels&#34;</span><span style="color:#000;font-weight:bold">:[</span>
</span></span><span style="display:flex;"><span> <span style="color:#4e9a06">&#34;directedBy&#34;</span>
</span></span><span style="display:flex;"><span> <span style="color:#000;font-weight:bold">],</span>
</span></span><span style="display:flex;"><span> <span style="color:#204a87;font-weight:bold">&#34;max_degree&#34;</span><span style="color:#000;font-weight:bold">:</span><span style="color:#0000cf;font-weight:bold">-1</span><span style="color:#000;font-weight:bold">,</span>
</span></span><span style="display:flex;"><span> <span style="color:#204a87;font-weight:bold">&#34;top&#34;</span><span style="color:#000;font-weight:bold">:</span><span style="color:#0000cf;font-weight:bold">100</span>
</span></span><span style="display:flex;"><span> <span style="color:#000;font-weight:bold">}</span>
</span></span><span style="display:flex;"><span> <span style="color:#000;font-weight:bold">],</span>
</span></span><span style="display:flex;"><span> <span style="color:#204a87;font-weight:bold">&#34;alpha&#34;</span><span style="color:#000;font-weight:bold">:</span><span style="color:#0000cf;font-weight:bold">0.9</span><span style="color:#000;font-weight:bold">,</span>
</span></span><span style="display:flex;"><span> <span style="color:#204a87;font-weight:bold">&#34;capacity&#34;</span><span style="color:#000;font-weight:bold">:</span><span style="color:#0000cf;font-weight:bold">-1</span>
</span></span><span style="display:flex;"><span><span style="color:#000;font-weight:bold">}</span>
</span></span></code></pre></div><h6 id="response-status-1">Response Status</h6>
<div class="highlight"><pre tabindex="0" style="background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4;"><code class="language-json" data-lang="json"><span style="display:flex;"><span><span style="color:#0000cf;font-weight:bold">200</span>
</span></span></code></pre></div><h6 id="response-body-1">Response Body</h6>
<div class="highlight"><pre tabindex="0" style="background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4;"><code class="language-json" data-lang="json"><span style="display:flex;"><span><span style="color:#000;font-weight:bold">{</span>
</span></span><span style="display:flex;"><span> <span style="color:#204a87;font-weight:bold">&#34;ranks&#34;</span><span style="color:#000;font-weight:bold">:</span> <span style="color:#000;font-weight:bold">[</span>
</span></span><span style="display:flex;"><span> <span style="color:#000;font-weight:bold">{</span>
</span></span><span style="display:flex;"><span> <span style="color:#204a87;font-weight:bold">&#34;O&#34;</span><span style="color:#000;font-weight:bold">:</span> <span style="color:#0000cf;font-weight:bold">1</span>
</span></span><span style="display:flex;"><span> <span style="color:#000;font-weight:bold">},</span>
</span></span><span style="display:flex;"><span> <span style="color:#000;font-weight:bold">{</span>
</span></span><span style="display:flex;"><span> <span style="color:#204a87;font-weight:bold">&#34;B&#34;</span><span style="color:#000;font-weight:bold">:</span> <span style="color:#0000cf;font-weight:bold">0.4305</span><span style="color:#000;font-weight:bold">,</span>
</span></span><span style="display:flex;"><span> <span style="color:#204a87;font-weight:bold">&#34;A&#34;</span><span style="color:#000;font-weight:bold">:</span> <span style="color:#0000cf;font-weight:bold">0.3</span><span style="color:#000;font-weight:bold">,</span>
</span></span><span style="display:flex;"><span> <span style="color:#204a87;font-weight:bold">&#34;C&#34;</span><span style="color:#000;font-weight:bold">:</span> <span style="color:#0000cf;font-weight:bold">0.3</span>
</span></span><span style="display:flex;"><span> <span style="color:#000;font-weight:bold">},</span>
</span></span><span style="display:flex;"><span> <span style="color:#000;font-weight:bold">{</span>
</span></span><span style="display:flex;"><span> <span style="color:#204a87;font-weight:bold">&#34;G&#34;</span><span style="color:#000;font-weight:bold">:</span> <span style="color:#0000cf;font-weight:bold">0.17550000000000002</span><span style="color:#000;font-weight:bold">,</span>
</span></span><span style="display:flex;"><span> <span style="color:#204a87;font-weight:bold">&#34;H&#34;</span><span style="color:#000;font-weight:bold">:</span> <span style="color:#0000cf;font-weight:bold">0.17550000000000002</span><span style="color:#000;font-weight:bold">,</span>
</span></span><span style="display:flex;"><span> <span style="color:#204a87;font-weight:bold">&#34;I&#34;</span><span style="color:#000;font-weight:bold">:</span> <span style="color:#0000cf;font-weight:bold">0.135</span><span style="color:#000;font-weight:bold">,</span>
</span></span><span style="display:flex;"><span> <span style="color:#204a87;font-weight:bold">&#34;J&#34;</span><span style="color:#000;font-weight:bold">:</span> <span style="color:#0000cf;font-weight:bold">0.135</span><span style="color:#000;font-weight:bold">,</span>
</span></span><span style="display:flex;"><span> <span style="color:#204a87;font-weight:bold">&#34;E&#34;</span><span style="color:#000;font-weight:bold">:</span> <span style="color:#0000cf;font-weight:bold">0.09000000000000001</span><span style="color:#000;font-weight:bold">,</span>
</span></span><span style="display:flex;"><span> <span style="color:#204a87;font-weight:bold">&#34;F&#34;</span><span style="color:#000;font-weight:bold">:</span> <span style="color:#0000cf;font-weight:bold">0.09000000000000001</span>
</span></span><span style="display:flex;"><span> <span style="color:#000;font-weight:bold">},</span>
</span></span><span style="display:flex;"><span> <span style="color:#000;font-weight:bold">{</span>
</span></span><span style="display:flex;"><span> <span style="color:#204a87;font-weight:bold">&#34;M&#34;</span><span style="color:#000;font-weight:bold">:</span> <span style="color:#0000cf;font-weight:bold">0.15795</span><span style="color:#000;font-weight:bold">,</span>
</span></span><span style="display:flex;"><span> <span style="color:#204a87;font-weight:bold">&#34;K&#34;</span><span style="color:#000;font-weight:bold">:</span> <span style="color:#0000cf;font-weight:bold">0.08100000000000002</span><span style="color:#000;font-weight:bold">,</span>
</span></span><span style="display:flex;"><span> <span style="color:#204a87;font-weight:bold">&#34;L&#34;</span><span style="color:#000;font-weight:bold">:</span> <span style="color:#0000cf;font-weight:bold">0.04050000000000001</span>
</span></span><span style="display:flex;"><span> <span style="color:#000;font-weight:bold">}</span>
</span></span><span style="display:flex;"><span> <span style="color:#000;font-weight:bold">]</span>
</span></span><span style="display:flex;"><span><span style="color:#000;font-weight:bold">}</span>
</span></span></code></pre></div><h5 id="4223-适用场景">4.2.2.3 适用场景</h5>
<p>为给定的起点在不同的层中找到最应该推荐的顶点。</p>
<ul>
<li>比如：在观众、朋友、电影、导演的四层图结构中，根据某个观众的朋友们喜欢的电影，为这个观众推荐电影；或者根据这些电影是谁拍的，为其推荐导演。</li>
</ul>
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