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<section id="module-searx.plugins.unit_converter">
<span id="unit-converter"></span><span id="unit-converter-plugin"></span><h1>Unit Converter<a class="headerlink" href="#module-searx.plugins.unit_converter" title="Link to this heading"></a></h1>
<p>A plugin for converting measured values from one unit to another unit (a
unit converter).</p>
<p>The plugin looks up the symbols (given in the query term) in a list of
converters, each converter is one item in the list (compare
<a class="reference internal" href="#searx.plugins.unit_converter.ADDITIONAL_UNITS" title="searx.plugins.unit_converter.ADDITIONAL_UNITS"><code class="xref py py-obj docutils literal notranslate"><span class="pre">ADDITIONAL_UNITS</span></code></a>). If the symbols are ambiguous, the matching units
of measurement are evaluated. The weighting in the evaluation results from the
sorting of the <a class="reference internal" href="#searx.plugins.unit_converter.symbol_to_si" title="searx.plugins.unit_converter.symbol_to_si"><code class="xref py py-obj docutils literal notranslate"><span class="pre">list</span> <span class="pre">of</span> <span class="pre">unit</span> <span class="pre">converters</span></code></a>.</p>
<dl class="py class">
<dt class="sig sig-object py" id="searx.plugins.unit_converter.SXNGPlugin">
<em class="property"><span class="pre">class</span><span class="w"> </span></em><span class="sig-prename descclassname"><span class="pre">searx.plugins.unit_converter.</span></span><span class="sig-name descname"><span class="pre">SXNGPlugin</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">plg_cfg</span></span><span class="p"><span class="pre">:</span></span><span class="w"> </span><span class="n"><a class="reference internal" href="development.html#searx.plugins.PluginCfg" title="searx.plugins.PluginCfg"><span class="pre">PluginCfg</span></a></span></em><span class="sig-paren">)</span><a class="reference internal" href="../../_modules/searx/plugins/unit_converter.html#SXNGPlugin"><span class="viewcode-link"><span class="pre">[source]</span></span></a><a class="headerlink" href="#searx.plugins.unit_converter.SXNGPlugin" title="Link to this definition"></a></dt>
<dd><p>Convert between units. The result is displayed in area for the
“answers”.</p>
<dl class="py attribute">
<dt class="sig sig-object py" id="searx.plugins.unit_converter.SXNGPlugin.id">
<span class="sig-name descname"><span class="pre">id</span></span><em class="property"><span class="p"><span class="pre">:</span></span><span class="w"> </span><a class="reference external" href="https://docs.python.org/3/library/stdtypes.html#str" title="(in Python v3.13)"><span class="pre">str</span></a></em><em class="property"><span class="w"> </span><span class="p"><span class="pre">=</span></span><span class="w"> </span><span class="pre">'unit_converter'</span></em><a class="headerlink" href="#searx.plugins.unit_converter.SXNGPlugin.id" title="Link to this definition"></a></dt>
<dd><p>The ID (suffix) in the HTML form.</p>
</dd></dl>
<dl class="py method">
<dt class="sig sig-object py" id="searx.plugins.unit_converter.SXNGPlugin.post_search">
<span class="sig-name descname"><span class="pre">post_search</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">request</span></span><span class="p"><span class="pre">:</span></span><span class="w"> </span><span class="n"><a class="reference internal" href="../extended_types.html#searx.extended_types.SXNG_Request" title="searx.extended_types.SXNG_Request"><span class="pre">SXNG_Request</span></a></span></em>, <em class="sig-param"><span class="n"><span class="pre">search</span></span><span class="p"><span class="pre">:</span></span><span class="w"> </span><span class="n"><a class="reference internal" href="../../src/searx.search.html#searx.search.SearchWithPlugins" title="searx.search.SearchWithPlugins"><span class="pre">SearchWithPlugins</span></a></span></em><span class="sig-paren">)</span> <span class="sig-return"><span class="sig-return-icon">&#x2192;</span> <span class="sig-return-typehint"><a class="reference internal" href="../engines/index.html#searx.result_types.EngineResults" title="searx.result_types.EngineResults"><span class="pre">EngineResults</span></a></span></span><a class="reference internal" href="../../_modules/searx/plugins/unit_converter.html#SXNGPlugin.post_search"><span class="viewcode-link"><span class="pre">[source]</span></span></a><a class="headerlink" href="#searx.plugins.unit_converter.SXNGPlugin.post_search" title="Link to this definition"></a></dt>
<dd><p>Runs AFTER the search request. Can return a list of
<a class="reference internal" href="../result_types/base_result.html#searx.result_types._base.Result" title="searx.result_types._base.Result"><code class="xref py py-obj docutils literal notranslate"><span class="pre">Result</span></code></a> objects to be added to the
final result list.</p>
</dd></dl>
</dd></dl>
<dl class="py data">
<dt class="sig sig-object py" id="searx.plugins.unit_converter.ADDITIONAL_UNITS">
<span class="sig-prename descclassname"><span class="pre">searx.plugins.unit_converter.</span></span><span class="sig-name descname"><span class="pre">ADDITIONAL_UNITS</span></span><em class="property"><span class="w"> </span><span class="p"><span class="pre">=</span></span><span class="w"> </span><span class="pre">[{'from_si':</span> <span class="pre">&lt;function</span> <span class="pre">&lt;lambda&gt;&gt;,</span> <span class="pre">'si_name':</span> <span class="pre">'Q11579',</span> <span class="pre">'symbol':</span> <span class="pre">'°C',</span> <span class="pre">'to_si':</span> <span class="pre">&lt;function</span> <span class="pre">&lt;lambda&gt;&gt;},</span> <span class="pre">{'from_si':</span> <span class="pre">&lt;function</span> <span class="pre">&lt;lambda&gt;&gt;,</span> <span class="pre">'si_name':</span> <span class="pre">'Q11579',</span> <span class="pre">'symbol':</span> <span class="pre">'°F',</span> <span class="pre">'to_si':</span> <span class="pre">&lt;function</span> <span class="pre">&lt;lambda&gt;&gt;}]</span></em><a class="headerlink" href="#searx.plugins.unit_converter.ADDITIONAL_UNITS" title="Link to this definition"></a></dt>
<dd><p>Additional items to convert from a measure unit to a SI unit (vice versa).</p>
<div class="highlight-python notranslate"><div class="highlight"><pre><span></span><span class="p">{</span>
<span class="s2">&quot;si_name&quot;</span><span class="p">:</span> <span class="s2">&quot;Q11579&quot;</span><span class="p">,</span> <span class="c1"># Wikidata item ID of the SI unit (Kelvin)</span>
<span class="s2">&quot;symbol&quot;</span><span class="p">:</span> <span class="s2">&quot;°C&quot;</span><span class="p">,</span> <span class="c1"># symbol of the measure unit</span>
<span class="s2">&quot;to_si&quot;</span><span class="p">:</span> <span class="k">lambda</span> <span class="n">val</span><span class="p">:</span> <span class="n">val</span> <span class="o">+</span> <span class="mf">273.15</span><span class="p">,</span> <span class="c1"># convert measure value (val) to SI unit</span>
<span class="s2">&quot;from_si&quot;</span><span class="p">:</span> <span class="k">lambda</span> <span class="n">val</span><span class="p">:</span> <span class="n">val</span> <span class="o">-</span> <span class="mf">273.15</span><span class="p">,</span> <span class="c1"># convert SI value (val) measure unit</span>
<span class="p">},</span>
<span class="p">{</span>
<span class="s2">&quot;si_name&quot;</span><span class="p">:</span> <span class="s2">&quot;Q11573&quot;</span><span class="p">,</span>
<span class="s2">&quot;symbol&quot;</span><span class="p">:</span> <span class="s2">&quot;mi&quot;</span><span class="p">,</span>
<span class="s2">&quot;to_si&quot;</span><span class="p">:</span> <span class="mf">1609.344</span><span class="p">,</span> <span class="c1"># convert measure value (val) to SI unit</span>
<span class="s2">&quot;from_si&quot;</span><span class="p">:</span> <span class="mi">1</span> <span class="o">/</span> <span class="mf">1609.344</span> <span class="c1"># convert SI value (val) measure unit</span>
<span class="p">},</span>
</pre></div>
</div>
<p>The values of <code class="docutils literal notranslate"><span class="pre">to_si</span></code> and <code class="docutils literal notranslate"><span class="pre">from_si</span></code> can be of <a class="reference external" href="https://docs.python.org/3/library/functions.html#float" title="(in Python v3.13)"><code class="xref py py-obj docutils literal notranslate"><span class="pre">float</span></code></a> (a multiplier)
or a <a class="reference external" href="https://docs.python.org/3/glossary.html#term-callable">callable</a> (val in / converted value returned).</p>
</dd></dl>
<dl class="py data">
<dt class="sig sig-object py" id="searx.plugins.unit_converter.ALIAS_SYMBOLS">
<span class="sig-prename descclassname"><span class="pre">searx.plugins.unit_converter.</span></span><span class="sig-name descname"><span class="pre">ALIAS_SYMBOLS</span></span><em class="property"><span class="w"> </span><span class="p"><span class="pre">=</span></span><span class="w"> </span><span class="pre">{'mi':</span> <span class="pre">('L',),</span> <span class="pre">'°C':</span> <span class="pre">('C',),</span> <span class="pre">'°F':</span> <span class="pre">('F',)}</span></em><a class="headerlink" href="#searx.plugins.unit_converter.ALIAS_SYMBOLS" title="Link to this definition"></a></dt>
<dd><p>Alias symbols for known unit of measure symbols / by example:</p>
<div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="s1">&#39;°C&#39;</span><span class="p">:</span> <span class="p">(</span><span class="s1">&#39;C&#39;</span><span class="p">,</span> <span class="o">...</span><span class="p">),</span> <span class="c1"># list of alias symbols for °C (Q69362731)</span>
<span class="s1">&#39;°F&#39;</span><span class="p">:</span> <span class="p">(</span><span class="s1">&#39;F&#39;</span><span class="p">,</span> <span class="o">...</span><span class="p">),</span> <span class="c1"># list of alias symbols for °F (Q99490479)</span>
<span class="s1">&#39;mi&#39;</span><span class="p">:</span> <span class="p">(</span><span class="s1">&#39;L&#39;</span><span class="p">,),</span> <span class="c1"># list of alias symbols for mi (Q253276)</span>
</pre></div>
</div>
</dd></dl>
<dl class="py function">
<dt class="sig sig-object py" id="searx.plugins.unit_converter.symbol_to_si">
<span class="sig-prename descclassname"><span class="pre">searx.plugins.unit_converter.</span></span><span class="sig-name descname"><span class="pre">symbol_to_si</span></span><span class="sig-paren">(</span><span class="sig-paren">)</span><a class="reference internal" href="../../_modules/searx/plugins/unit_converter.html#symbol_to_si"><span class="viewcode-link"><span class="pre">[source]</span></span></a><a class="headerlink" href="#searx.plugins.unit_converter.symbol_to_si" title="Link to this definition"></a></dt>
<dd><p>Generates a list of tuples, each tuple is a measure unit and the fields
in the tuple are:</p>
<ol class="arabic simple" start="0">
<li><p>Symbol of the measure unit (e.g. ‘mi’ for measure unit ‘miles’ Q253276)</p></li>
<li><p>SI name of the measure unit (e.g. Q11573 for SI unit ‘metre’)</p></li>
<li><p>Factor to get SI value from measure unit (e.g. 1mi is equal to SI 1m
multiplied by 1609.344)</p></li>
<li><p>Factor to get measure value from from SI value (e.g. SI 100m is equal to
100mi divided by 1609.344)</p></li>
</ol>
<p>The returned list is sorted, the first items are created from
<code class="docutils literal notranslate"><span class="pre">WIKIDATA_UNITS</span></code>, the second group of items is build from
<a class="reference internal" href="#searx.plugins.unit_converter.ADDITIONAL_UNITS" title="searx.plugins.unit_converter.ADDITIONAL_UNITS"><code class="xref py py-obj docutils literal notranslate"><span class="pre">ADDITIONAL_UNITS</span></code></a> and items created from <a class="reference internal" href="#searx.plugins.unit_converter.ALIAS_SYMBOLS" title="searx.plugins.unit_converter.ALIAS_SYMBOLS"><code class="xref py py-obj docutils literal notranslate"><span class="pre">ALIAS_SYMBOLS</span></code></a>.</p>
<p>If you search this list for a symbol, then a match with a symbol from
Wikidata has the highest weighting (first hit in the list), followed by the
symbols from the <a class="reference internal" href="#searx.plugins.unit_converter.ADDITIONAL_UNITS" title="searx.plugins.unit_converter.ADDITIONAL_UNITS"><code class="xref py py-obj docutils literal notranslate"><span class="pre">ADDITIONAL_UNITS</span></code></a> and the lowest weighting is
given to the symbols resulting from the aliases <a class="reference internal" href="#searx.plugins.unit_converter.ALIAS_SYMBOLS" title="searx.plugins.unit_converter.ALIAS_SYMBOLS"><code class="xref py py-obj docutils literal notranslate"><span class="pre">ALIAS_SYMBOLS</span></code></a>.</p>
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<li class="toctree-l4 current"><a class="current reference internal" href="#">Unit Converter</a><ul>
<li class="toctree-l5"><a class="reference internal" href="#searx.plugins.unit_converter.SXNGPlugin"><code class="docutils literal notranslate"><span class="pre">SXNGPlugin</span></code></a></li>
<li class="toctree-l5"><a class="reference internal" href="#searx.plugins.unit_converter.ADDITIONAL_UNITS"><code class="docutils literal notranslate"><span class="pre">ADDITIONAL_UNITS</span></code></a></li>
<li class="toctree-l5"><a class="reference internal" href="#searx.plugins.unit_converter.ALIAS_SYMBOLS"><code class="docutils literal notranslate"><span class="pre">ALIAS_SYMBOLS</span></code></a></li>
<li class="toctree-l5"><a class="reference internal" href="#searx.plugins.unit_converter.symbol_to_si"><code class="docutils literal notranslate"><span class="pre">symbol_to_si()</span></code></a></li>
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