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<li class="nav-item nav-item-this"><a href="">NoSQL databases</a></li>
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<section id="nosql-databases">
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<span id="nosql-engines"></span><h1>NoSQL databases<a class="headerlink" href="#nosql-databases" title="Permalink to this heading">¶</a></h1>
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<aside class="sidebar">
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<p class="sidebar-title">further read</p>
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<ul class="simple">
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<li><p><a class="reference external" href="https://en.wikipedia.org/wiki/NoSQL">NoSQL databases</a></p></li>
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<li><p><a class="reference external" href="https://redis.io/">redis.io</a></p></li>
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<li><p><a class="reference external" href="https://www.mongodb.com">MongoDB</a></p></li>
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</ul>
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</aside>
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<nav class="contents local" id="contents">
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<ul class="simple">
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<li><p><a class="reference internal" href="#extra-dependencies" id="id6">Extra Dependencies</a></p></li>
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<li><p><a class="reference internal" href="#configure-the-engines" id="id7">Configure the engines</a></p>
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<ul>
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<li><p><a class="reference internal" href="#redis-server" id="id8">Redis Server</a></p></li>
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<li><p><a class="reference internal" href="#engine-mongodb" id="id9">MongoDB</a></p></li>
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</ul>
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</li>
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</ul>
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</nav>
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<aside class="sidebar">
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<p class="sidebar-title">info</p>
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<p>Initial sponsored by <a class="reference external" href="https://nlnet.nl/discovery">Search and Discovery Fund</a> of <a class="reference external" href="https://nlnet.nl/">NLnet Foundation</a>.</p>
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</aside>
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<p>The following <a class="reference external" href="https://en.wikipedia.org/wiki/NoSQL">NoSQL databases</a> are supported:</p>
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<ul class="simple">
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<li><p><a class="reference internal" href="#engine-redis-server"><span class="std std-ref">Redis Server</span></a></p></li>
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<li><p><a class="reference internal" href="#engine-mongodb"><span class="std std-ref">MongoDB</span></a></p></li>
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</ul>
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<p>All of the engines above are just commented out in the <a class="reference external" href="https://github.com/searxng/searxng/blob/master/searx/settings.yml">settings.yml</a>, as you have to set various options and install
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dependencies before using them.</p>
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<p>By default, the engines use the <code class="docutils literal notranslate"><span class="pre">key-value</span></code> template for displaying results /
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see <a class="reference external" href="https://github.com/searxng/searxng/blob/master/searx/templates/simple/result_templates/key-value.html">simple</a>
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theme. If you are not satisfied with the original result layout, you can use
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your own template, set <code class="docutils literal notranslate"><span class="pre">result_template</span></code> attribute to <code class="docutils literal notranslate"><span class="pre">{template_name}</span></code> and
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place the templates at:</p>
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<div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="n">searx</span><span class="o">/</span><span class="n">templates</span><span class="o">/</span><span class="p">{</span><span class="n">theme_name</span><span class="p">}</span><span class="o">/</span><span class="n">result_templates</span><span class="o">/</span><span class="p">{</span><span class="n">template_name</span><span class="p">}</span>
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</pre></div>
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</div>
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<p>Furthermore, if you do not wish to expose these engines on a public instance, you
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can still add them and limit the access by setting <code class="docutils literal notranslate"><span class="pre">tokens</span></code> as described in
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section <a class="reference internal" href="../../../admin/settings/settings_engine.html#private-engines"><span class="std std-ref">Private Engines (tokens)</span></a>.</p>
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<section id="extra-dependencies">
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<h2><a class="toc-backref" href="#id6" role="doc-backlink">Extra Dependencies</a><a class="headerlink" href="#extra-dependencies" title="Permalink to this heading">¶</a></h2>
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<p>For using <a class="reference internal" href="#engine-redis-server"><span class="std std-ref">Redis Server</span></a> or <a class="reference internal" href="#engine-mongodb"><span class="std std-ref">MongoDB</span></a> you need to
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install additional packages in Python’s Virtual Environment of your SearXNG
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instance. To switch into the environment (<a class="reference internal" href="../../../admin/installation-searxng.html#searxng-src"><span class="std std-ref">Install SearXNG & dependencies</span></a>) you can use
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<a class="reference internal" href="../../../utils/searxng.sh.html#searxng-sh"><span class="std std-ref">utils/searxng.sh</span></a>:</p>
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<div class="highlight-default notranslate"><div class="highlight"><pre><span></span>$ sudo utils/searxng.sh instance cmd bash
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(searxng-pyenv)$ pip install ...
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</pre></div>
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</div>
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</section>
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<section id="configure-the-engines">
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<h2><a class="toc-backref" href="#id7" role="doc-backlink">Configure the engines</a><a class="headerlink" href="#configure-the-engines" title="Permalink to this heading">¶</a></h2>
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<p><a class="reference external" href="https://en.wikipedia.org/wiki/NoSQL">NoSQL databases</a> are used for storing arbitrary data without first defining
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their structure.</p>
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<section id="redis-server">
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<span id="engine-redis-server"></span><h3><a class="toc-backref" href="#id8" role="doc-backlink">Redis Server</a><a class="headerlink" href="#redis-server" title="Permalink to this heading">¶</a></h3>
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<aside class="sidebar">
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<p class="sidebar-title">info</p>
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<ul class="simple">
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<li><p><code class="docutils literal notranslate"><span class="pre">pip</span> <span class="pre">install</span></code> <a class="reference external" href="https://github.com/andymccurdy/redis-py#installation">redis</a></p></li>
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<li><p><a class="reference external" href="https://redis.io/">redis.io</a></p></li>
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<li><p><a class="reference external" href="https://github.com/searxng/searxng/blob/master/searx/engines/redis_server.py">redis_server.py</a></p></li>
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</ul>
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</aside>
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<span class="target" id="module-searx.engines.redis_server"></span><p>Redis is an open source (BSD licensed), in-memory data structure (key value
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based) store. Before configuring the <code class="docutils literal notranslate"><span class="pre">redis_server</span></code> engine, you must install
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the dependency <a class="reference external" href="https://github.com/andymccurdy/redis-py#installation">redis</a>.</p>
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<section id="configuration">
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<h4>Configuration<a class="headerlink" href="#configuration" title="Permalink to this heading">¶</a></h4>
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<p>Select a database to search in and set its index in the option <code class="docutils literal notranslate"><span class="pre">db</span></code>. You can
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either look for exact matches or use partial keywords to find what you are
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looking for by configuring <code class="docutils literal notranslate"><span class="pre">exact_match_only</span></code>.</p>
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</section>
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<section id="example">
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<h4>Example<a class="headerlink" href="#example" title="Permalink to this heading">¶</a></h4>
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<p>Below is an example configuration:</p>
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<div class="highlight-yaml notranslate"><div class="highlight"><pre><span></span><span class="c1"># Required dependency: redis</span>
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<span class="p p-Indicator">-</span><span class="w"> </span><span class="nt">name</span><span class="p">:</span><span class="w"> </span><span class="l l-Scalar l-Scalar-Plain">myredis</span>
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<span class="w"> </span><span class="nt">shortcut </span><span class="p">:</span><span class="w"> </span><span class="l l-Scalar l-Scalar-Plain">rds</span>
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<span class="w"> </span><span class="nt">engine</span><span class="p">:</span><span class="w"> </span><span class="l l-Scalar l-Scalar-Plain">redis_server</span>
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<span class="w"> </span><span class="nt">exact_match_only</span><span class="p">:</span><span class="w"> </span><span class="l l-Scalar l-Scalar-Plain">false</span>
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<span class="w"> </span><span class="nt">host</span><span class="p">:</span><span class="w"> </span><span class="s">'127.0.0.1'</span>
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<span class="w"> </span><span class="nt">port</span><span class="p">:</span><span class="w"> </span><span class="l l-Scalar l-Scalar-Plain">6379</span>
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<span class="w"> </span><span class="nt">enable_http</span><span class="p">:</span><span class="w"> </span><span class="l l-Scalar l-Scalar-Plain">true</span>
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<span class="w"> </span><span class="nt">password</span><span class="p">:</span><span class="w"> </span><span class="s">''</span>
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<span class="w"> </span><span class="nt">db</span><span class="p">:</span><span class="w"> </span><span class="l l-Scalar l-Scalar-Plain">0</span>
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</pre></div>
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</div>
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</section>
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<section id="implementations">
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<h4>Implementations<a class="headerlink" href="#implementations" title="Permalink to this heading">¶</a></h4>
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</section>
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</section>
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<section id="engine-mongodb">
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<span id="id2"></span><h3><a class="toc-backref" href="#id9" role="doc-backlink">MongoDB</a><a class="headerlink" href="#engine-mongodb" title="Permalink to this heading">¶</a></h3>
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<aside class="sidebar">
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<p class="sidebar-title">info</p>
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<ul class="simple">
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<li><p><code class="docutils literal notranslate"><span class="pre">pip</span> <span class="pre">install</span></code> <a class="reference external" href="https://github.com/mongodb/mongo-python-driver#installation">pymongo</a></p></li>
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<li><p><a class="reference external" href="https://www.mongodb.com">MongoDB</a></p></li>
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<li><p><a class="reference external" href="https://github.com/searxng/searxng/blob/master/searx/engines/mongodb.py">mongodb.py</a></p></li>
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</ul>
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</aside>
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<span class="target" id="module-searx.engines.mongodb"></span><p><a class="reference external" href="https://www.mongodb.com">MongoDB</a> is a document based database program that handles JSON like data.
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Before configuring the <code class="docutils literal notranslate"><span class="pre">mongodb</span></code> engine, you must install the dependency
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<a class="reference external" href="https://github.com/mongodb/mongo-python-driver#installation">pymongo</a>.</p>
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<section id="id3">
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<h4>Configuration<a class="headerlink" href="#id3" title="Permalink to this heading">¶</a></h4>
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<p>In order to query <a class="reference external" href="https://www.mongodb.com">MongoDB</a>, you have to select a <code class="docutils literal notranslate"><span class="pre">database</span></code> and a
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<code class="docutils literal notranslate"><span class="pre">collection</span></code>. Furthermore, you have to select a <code class="docutils literal notranslate"><span class="pre">key</span></code> that is going to be
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searched. <a class="reference external" href="https://www.mongodb.com">MongoDB</a> also supports the option <code class="docutils literal notranslate"><span class="pre">exact_match_only</span></code>, so configure
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it as you wish.</p>
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</section>
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<section id="id4">
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<h4>Example<a class="headerlink" href="#id4" title="Permalink to this heading">¶</a></h4>
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<p>Below is an example configuration for using a MongoDB collection:</p>
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<div class="highlight-yaml notranslate"><div class="highlight"><pre><span></span><span class="c1"># MongoDB engine</span>
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<span class="c1"># Required dependency: pymongo</span>
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<span class="p p-Indicator">-</span><span class="w"> </span><span class="nt">name</span><span class="p">:</span><span class="w"> </span><span class="l l-Scalar l-Scalar-Plain">mymongo</span>
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<span class="w"> </span><span class="nt">engine</span><span class="p">:</span><span class="w"> </span><span class="l l-Scalar l-Scalar-Plain">mongodb</span>
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<span class="w"> </span><span class="nt">shortcut</span><span class="p">:</span><span class="w"> </span><span class="l l-Scalar l-Scalar-Plain">md</span>
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<span class="w"> </span><span class="nt">exact_match_only</span><span class="p">:</span><span class="w"> </span><span class="l l-Scalar l-Scalar-Plain">false</span>
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<span class="w"> </span><span class="nt">host</span><span class="p">:</span><span class="w"> </span><span class="s">'127.0.0.1'</span>
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<span class="w"> </span><span class="nt">port</span><span class="p">:</span><span class="w"> </span><span class="l l-Scalar l-Scalar-Plain">27017</span>
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<span class="w"> </span><span class="nt">enable_http</span><span class="p">:</span><span class="w"> </span><span class="l l-Scalar l-Scalar-Plain">true</span>
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<span class="w"> </span><span class="nt">results_per_page</span><span class="p">:</span><span class="w"> </span><span class="l l-Scalar l-Scalar-Plain">20</span>
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<span class="w"> </span><span class="nt">database</span><span class="p">:</span><span class="w"> </span><span class="s">'business'</span>
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<span class="w"> </span><span class="nt">collection</span><span class="p">:</span><span class="w"> </span><span class="s">'reviews'</span><span class="w"> </span><span class="c1"># name of the db collection</span>
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<span class="w"> </span><span class="nt">key</span><span class="p">:</span><span class="w"> </span><span class="s">'name'</span><span class="w"> </span><span class="c1"># key in the collection to search for</span>
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</pre></div>
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</div>
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</section>
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<section id="id5">
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<h4>Implementations<a class="headerlink" href="#id5" title="Permalink to this heading">¶</a></h4>
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</section>
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</section>
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</section>
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</section>
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<div class="clearer"></div>
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</div>
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</div>
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</div>
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<span id="sidebar-top"></span>
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<div class="sphinxsidebar" role="navigation" aria-label="main navigation">
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<div class="sphinxsidebarwrapper">
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<p class="logo"><a href="../../../index.html">
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<img class="logo" src="../../../_static/searxng-wordmark.svg" alt="Logo"/>
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</a></p>
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<h3><a href="../../../index.html">Table of Contents</a></h3>
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<ul class="current">
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<li class="toctree-l1"><a class="reference internal" href="../../../user/index.html">User information</a></li>
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<li class="toctree-l1"><a class="reference internal" href="../../../own-instance.html">Why use a private instance?</a></li>
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<li class="toctree-l1"><a class="reference internal" href="../../../admin/index.html">Administrator documentation</a></li>
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