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unit_converter.html

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  8.     <title>searx.plugins.unit_converter &#8212; SearXNG Documentation (2025.5.1+1a1628149)</title>
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    28. 

  28.           <li class="nav-item nav-item-1"><a href="../../index.html" accesskey="U">Module code</a> &#187;</li>
    29. 

  29.         <li class="nav-item nav-item-this"><a href="">searx.plugins.unit_converter</a></li> 
    30. 

  30.       </ul>
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  33.     <div class="document">
    34. 

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    35. 

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    36. 

  36.           <div class="body" role="main">
    37. 

  37.             
    38. 

  38.   <h1>Source code for searx.plugins.unit_converter</h1><div class="highlight"><pre>
    39. 

  39. <span></span><span class="c1"># SPDX-License-Identifier: AGPL-3.0-or-later</span>
    40. 

  40. <span class="sd">&quot;&quot;&quot;A plugin for converting measured values from one unit to another unit (a</span>
    41. 

  41. <span class="sd">unit converter).</span>
    42. 

  42. 

  43. <span class="sd">The plugin looks up the symbols (given in the query term) in a list of</span>
    44. 

  44. <span class="sd">converters, each converter is one item in the list (compare</span>
    45. 

  45. <span class="sd">:py:obj:`ADDITIONAL_UNITS`).  If the symbols are ambiguous, the matching units</span>
    46. 

  46. <span class="sd">of measurement are evaluated.  The weighting in the evaluation results from the</span>
    47. 

  47. <span class="sd">sorting of the :py:obj:`list of unit converters&lt;symbol_to_si&gt;`.</span>
    48. 

  48. <span class="sd">&quot;&quot;&quot;</span>
    49. 

  49. <span class="kn">from</span><span class="w"> </span><span class="nn">__future__</span><span class="w"> </span><span class="kn">import</span> <span class="n">annotations</span>
    50. 

  50. <span class="kn">import</span><span class="w"> </span><span class="nn">typing</span>
    51. 

  51. <span class="kn">import</span><span class="w"> </span><span class="nn">re</span>
    52. 

  52. <span class="kn">import</span><span class="w"> </span><span class="nn">babel.numbers</span>
    53. 

  53. 

  54. <span class="kn">from</span><span class="w"> </span><span class="nn">flask_babel</span><span class="w"> </span><span class="kn">import</span> <span class="n">gettext</span><span class="p">,</span> <span class="n">get_locale</span>
    55. 

  55. 

  56. <span class="kn">from</span><span class="w"> </span><span class="nn">searx</span><span class="w"> </span><span class="kn">import</span> <span class="n">data</span>
    57. 

  57. <span class="kn">from</span><span class="w"> </span><span class="nn">searx.plugins</span><span class="w"> </span><span class="kn">import</span> <span class="n">Plugin</span><span class="p">,</span> <span class="n">PluginInfo</span>
    58. 

  58. <span class="kn">from</span><span class="w"> </span><span class="nn">searx.result_types</span><span class="w"> </span><span class="kn">import</span> <span class="n">EngineResults</span>
    59. 

  59. 

  60. <span class="k">if</span> <span class="n">typing</span><span class="o">.</span><span class="n">TYPE_CHECKING</span><span class="p">:</span>
    61. 

  61.     <span class="kn">from</span><span class="w"> </span><span class="nn">searx.search</span><span class="w"> </span><span class="kn">import</span> <span class="n">SearchWithPlugins</span>
    62. 

  62.     <span class="kn">from</span><span class="w"> </span><span class="nn">searx.extended_types</span><span class="w"> </span><span class="kn">import</span> <span class="n">SXNG_Request</span>
    63. 

  63.     <span class="kn">from</span><span class="w"> </span><span class="nn">searx.plugins</span><span class="w"> </span><span class="kn">import</span> <span class="n">PluginCfg</span>
    64. 

  64. 

  65. 

  66. <span class="n">name</span> <span class="o">=</span> <span class="s2">&quot;&quot;</span>
    67. 

  67. <span class="n">description</span> <span class="o">=</span> <span class="n">gettext</span><span class="p">(</span><span class="s2">&quot;&quot;</span><span class="p">)</span>
    68. 

  68. 

  69. <span class="n">plugin_id</span> <span class="o">=</span> <span class="s2">&quot;&quot;</span>
    70. 

  70. <span class="n">preference_section</span> <span class="o">=</span> <span class="s2">&quot;&quot;</span>
    71. 

  71. 

  72. <span class="n">CONVERT_KEYWORDS</span> <span class="o">=</span> <span class="p">[</span><span class="s2">&quot;in&quot;</span><span class="p">,</span> <span class="s2">&quot;to&quot;</span><span class="p">,</span> <span class="s2">&quot;as&quot;</span><span class="p">]</span>
    73. 

  73. 

  74. 

  75. <div class="viewcode-block" id="SXNGPlugin">
    76. 

  76. <a class="viewcode-back" href="../../../dev/plugins/unit_converter.html#searx.plugins.unit_converter.SXNGPlugin">[docs]</a>
    77. 

  77. <span class="k">class</span><span class="w"> </span><span class="nc">SXNGPlugin</span><span class="p">(</span><span class="n">Plugin</span><span class="p">):</span>
    78. 

  78. <span class="w">    </span><span class="sd">&quot;&quot;&quot;Convert between units.  The result is displayed in area for the</span>
    79. 

  79. <span class="sd">    &quot;answers&quot;.</span>
    80. 

  80. <span class="sd">    &quot;&quot;&quot;</span>
    81. 

  81. 

  82.     <span class="nb">id</span> <span class="o">=</span> <span class="s2">&quot;unit_converter&quot;</span>
    83. 

  83. 

  84.     <span class="k">def</span><span class="w"> </span><span class="fm">__init__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">plg_cfg</span><span class="p">:</span> <span class="s2">&quot;PluginCfg&quot;</span><span class="p">)</span> <span class="o">-&gt;</span> <span class="kc">None</span><span class="p">:</span>
    85. 

  85.         <span class="nb">super</span><span class="p">()</span><span class="o">.</span><span class="fm">__init__</span><span class="p">(</span><span class="n">plg_cfg</span><span class="p">)</span>
    86. 

  86. 

  87.         <span class="bp">self</span><span class="o">.</span><span class="n">info</span> <span class="o">=</span> <span class="n">PluginInfo</span><span class="p">(</span>
    88. 

  88.             <span class="nb">id</span><span class="o">=</span><span class="bp">self</span><span class="o">.</span><span class="n">id</span><span class="p">,</span>
    89. 

  89.             <span class="n">name</span><span class="o">=</span><span class="n">gettext</span><span class="p">(</span><span class="s2">&quot;Unit converter plugin&quot;</span><span class="p">),</span>
    90. 

  90.             <span class="n">description</span><span class="o">=</span><span class="n">gettext</span><span class="p">(</span><span class="s2">&quot;Convert between units&quot;</span><span class="p">),</span>
    91. 

  91.             <span class="n">preference_section</span><span class="o">=</span><span class="s2">&quot;general&quot;</span><span class="p">,</span>
    92. 

  92.         <span class="p">)</span>
    93. 

  93. 

  94. <div class="viewcode-block" id="SXNGPlugin.post_search">
    95. 

  95. <a class="viewcode-back" href="../../../dev/plugins/unit_converter.html#searx.plugins.unit_converter.SXNGPlugin.post_search">[docs]</a>
    96. 

  96.     <span class="k">def</span><span class="w"> </span><span class="nf">post_search</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">request</span><span class="p">:</span> <span class="s2">&quot;SXNG_Request&quot;</span><span class="p">,</span> <span class="n">search</span><span class="p">:</span> <span class="s2">&quot;SearchWithPlugins&quot;</span><span class="p">)</span> <span class="o">-&gt;</span> <span class="n">EngineResults</span><span class="p">:</span>
    97. 

  97.         <span class="n">results</span> <span class="o">=</span> <span class="n">EngineResults</span><span class="p">()</span>
    98. 

  98. 

  99.         <span class="c1"># only convert between units on the first page</span>
    100. 

  100.         <span class="k">if</span> <span class="n">search</span><span class="o">.</span><span class="n">search_query</span><span class="o">.</span><span class="n">pageno</span> <span class="o">&gt;</span> <span class="mi">1</span><span class="p">:</span>
    101. 

  101.             <span class="k">return</span> <span class="n">results</span>
    102. 

  102. 

  103.         <span class="n">query</span> <span class="o">=</span> <span class="n">search</span><span class="o">.</span><span class="n">search_query</span><span class="o">.</span><span class="n">query</span>
    104. 

  104.         <span class="n">query_parts</span> <span class="o">=</span> <span class="n">query</span><span class="o">.</span><span class="n">split</span><span class="p">(</span><span class="s2">&quot; &quot;</span><span class="p">)</span>
    105. 

  105. 

  106.         <span class="k">if</span> <span class="nb">len</span><span class="p">(</span><span class="n">query_parts</span><span class="p">)</span> <span class="o">&lt;</span> <span class="mi">3</span><span class="p">:</span>
    107. 

  107.             <span class="k">return</span> <span class="n">results</span>
    108. 

  108. 

  109.         <span class="k">for</span> <span class="n">query_part</span> <span class="ow">in</span> <span class="n">query_parts</span><span class="p">:</span>
    110. 

  110.             <span class="k">for</span> <span class="n">keyword</span> <span class="ow">in</span> <span class="n">CONVERT_KEYWORDS</span><span class="p">:</span>
    111. 

  111.                 <span class="k">if</span> <span class="n">query_part</span> <span class="o">==</span> <span class="n">keyword</span><span class="p">:</span>
    112. 

  112.                     <span class="n">from_query</span><span class="p">,</span> <span class="n">to_query</span> <span class="o">=</span> <span class="n">query</span><span class="o">.</span><span class="n">split</span><span class="p">(</span><span class="n">keyword</span><span class="p">,</span> <span class="mi">1</span><span class="p">)</span>
    113. 

  113.                     <span class="n">target_val</span> <span class="o">=</span> <span class="n">_parse_text_and_convert</span><span class="p">(</span><span class="n">from_query</span><span class="o">.</span><span class="n">strip</span><span class="p">(),</span> <span class="n">to_query</span><span class="o">.</span><span class="n">strip</span><span class="p">())</span>
    114. 

  114.                     <span class="k">if</span> <span class="n">target_val</span><span class="p">:</span>
    115. 

  115.                         <span class="n">results</span><span class="o">.</span><span class="n">add</span><span class="p">(</span><span class="n">results</span><span class="o">.</span><span class="n">types</span><span class="o">.</span><span class="n">Answer</span><span class="p">(</span><span class="n">answer</span><span class="o">=</span><span class="n">target_val</span><span class="p">))</span>
    116. 

  116. 

  117.         <span class="k">return</span> <span class="n">results</span></div>
    118. 

  118. </div>
    119. 

  119. 

  120. 

  121. 

  122. <span class="c1"># inspired from https://stackoverflow.com/a/42475086</span>
    123. 

  123. <span class="n">RE_MEASURE</span> <span class="o">=</span> <span class="sa">r</span><span class="s1">&#39;&#39;&#39;</span>
    124. 

  124. <span class="s1">(?P&lt;sign&gt;[-+]?)         # +/- or nothing for positive</span>
    125. 

  125. <span class="s1">(\s*)                   # separator: white space or nothing</span>
    126. 

  126. <span class="s1">(?P&lt;number&gt;[\d\.,]*)    # number: 1,000.00 (en) or 1.000,00 (de)</span>
    127. 

  127. <span class="s1">(?P&lt;E&gt;[eE][-+]?\d+)?    # scientific notation: e(+/-)2 (*10^2)</span>
    128. 

  128. <span class="s1">(\s*)                   # separator: white space or nothing</span>
    129. 

  129. <span class="s1">(?P&lt;unit&gt;\S+)           # unit of measure</span>
    130. 

  130. <span class="s1">&#39;&#39;&#39;</span>
    131. 

  131. 

  132. 

  133. <span class="n">ADDITIONAL_UNITS</span> <span class="o">=</span> <span class="p">[</span>
    134. 

  134.     <span class="p">{</span>
    135. 

  135.         <span class="s2">&quot;si_name&quot;</span><span class="p">:</span> <span class="s2">&quot;Q11579&quot;</span><span class="p">,</span>
    136. 

  136.         <span class="s2">&quot;symbol&quot;</span><span class="p">:</span> <span class="s2">&quot;°C&quot;</span><span class="p">,</span>
    137. 

  137.         <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>
    138. 

  138.         <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>
    139. 

  139.     <span class="p">},</span>
    140. 

  140.     <span class="p">{</span>
    141. 

  141.         <span class="s2">&quot;si_name&quot;</span><span class="p">:</span> <span class="s2">&quot;Q11579&quot;</span><span class="p">,</span>
    142. 

  142.         <span class="s2">&quot;symbol&quot;</span><span class="p">:</span> <span class="s2">&quot;°F&quot;</span><span class="p">,</span>
    143. 

  143.         <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="p">(</span><span class="n">val</span> <span class="o">+</span> <span class="mf">459.67</span><span class="p">)</span> <span class="o">*</span> <span class="mi">5</span> <span class="o">/</span> <span class="mi">9</span><span class="p">,</span>
    144. 

  144.         <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="p">(</span><span class="n">val</span> <span class="o">*</span> <span class="mi">9</span> <span class="o">/</span> <span class="mi">5</span><span class="p">)</span> <span class="o">-</span> <span class="mf">459.67</span><span class="p">,</span>
    145. 

  145.     <span class="p">},</span>
    146. 

  146. <span class="p">]</span>
    147. 

  147. <span class="sd">&quot;&quot;&quot;Additional items to convert from a measure unit to a SI unit (vice versa).</span>
    148. 

  148. 

  149. <span class="sd">.. code:: python</span>
    150. 

  150. 

  151. <span class="sd">    {</span>
    152. 

  152. <span class="sd">        &quot;si_name&quot;: &quot;Q11579&quot;,                 # Wikidata item ID of the SI unit (Kelvin)</span>
    153. 

  153. <span class="sd">        &quot;symbol&quot;: &quot;°C&quot;,                      # symbol of the measure unit</span>
    154. 

  154. <span class="sd">        &quot;to_si&quot;: lambda val: val + 273.15,   # convert measure value (val) to SI unit</span>
    155. 

  155. <span class="sd">        &quot;from_si&quot;: lambda val: val - 273.15, # convert SI value (val) measure unit</span>
    156. 

  156. <span class="sd">    },</span>
    157. 

  157. <span class="sd">    {</span>
    158. 

  158. <span class="sd">        &quot;si_name&quot;: &quot;Q11573&quot;,</span>
    159. 

  159. <span class="sd">        &quot;symbol&quot;: &quot;mi&quot;,</span>
    160. 

  160. <span class="sd">        &quot;to_si&quot;: 1609.344,                   # convert measure value (val) to SI unit</span>
    161. 

  161. <span class="sd">        &quot;from_si&quot;: 1 / 1609.344              # convert SI value (val) measure unit</span>
    162. 

  162. <span class="sd">    },</span>
    163. 

  163. 

  164. <span class="sd">The values of ``to_si`` and ``from_si`` can be of :py:obj:`float` (a multiplier)</span>
    165. 

  165. <span class="sd">or a callable_ (val in / converted value returned).</span>
    166. 

  166. 

  167. <span class="sd">.. _callable: https://docs.python.org/3/glossary.html#term-callable</span>
    168. 

  168. <span class="sd">&quot;&quot;&quot;</span>
    169. 

  169. 

  170. 

  171. <span class="n">ALIAS_SYMBOLS</span> <span class="o">=</span> <span class="p">{</span>
    172. 

  172.     <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>
    173. 

  173.     <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>
    174. 

  174.     <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>
    175. 

  175. <span class="p">}</span>
    176. 

  176. <span class="sd">&quot;&quot;&quot;Alias symbols for known unit of measure symbols / by example::</span>
    177. 

  177. 

  178. <span class="sd">    &#39;°C&#39;: (&#39;C&#39;, ...),  # list of alias symbols for °C (Q69362731)</span>
    179. 

  179. <span class="sd">    &#39;°F&#39;: (&#39;F&#39;, ...),  # list of alias symbols for °F (Q99490479)</span>
    180. 

  180. <span class="sd">    &#39;mi&#39;: (&#39;L&#39;,),      # list of alias symbols for mi (Q253276)</span>
    181. 

  181. <span class="sd">&quot;&quot;&quot;</span>
    182. 

  182. 

  183. 

  184. <span class="n">SYMBOL_TO_SI</span> <span class="o">=</span> <span class="p">[]</span>
    185. 

  185. 

  186. 

  187. <div class="viewcode-block" id="symbol_to_si">
    188. 

  188. <a class="viewcode-back" href="../../../dev/plugins/unit_converter.html#searx.plugins.unit_converter.symbol_to_si">[docs]</a>
    189. 

  189. <span class="k">def</span><span class="w"> </span><span class="nf">symbol_to_si</span><span class="p">():</span>
    190. 

  190. <span class="w">    </span><span class="sd">&quot;&quot;&quot;Generates a list of tuples, each tuple is a measure unit and the fields</span>
    191. 

  191. <span class="sd">    in the tuple are:</span>
    192. 

  192. 

  193. <span class="sd">    0. Symbol of the measure unit (e.g. &#39;mi&#39; for measure unit &#39;miles&#39; Q253276)</span>
    194. 

  194. 

  195. <span class="sd">    1. SI name of the measure unit (e.g. Q11573 for SI unit &#39;metre&#39;)</span>
    196. 

  196. 

  197. <span class="sd">    2. Factor to get SI value from measure unit (e.g. 1mi is equal to SI 1m</span>
    198. 

  198. <span class="sd">       multiplied by 1609.344)</span>
    199. 

  199. 

  200. <span class="sd">    3. Factor to get measure value from from SI value (e.g. SI 100m is equal to</span>
    201. 

  201. <span class="sd">       100mi divided by 1609.344)</span>
    202. 

  202. 

  203. <span class="sd">    The returned list is sorted, the first items are created from</span>
    204. 

  204. <span class="sd">    ``WIKIDATA_UNITS``, the second group of items is build from</span>
    205. 

  205. <span class="sd">    :py:obj:`ADDITIONAL_UNITS` and items created from :py:obj:`ALIAS_SYMBOLS`.</span>
    206. 

  206. 

  207. <span class="sd">    If you search this list for a symbol, then a match with a symbol from</span>
    208. 

  208. <span class="sd">    Wikidata has the highest weighting (first hit in the list), followed by the</span>
    209. 

  209. <span class="sd">    symbols from the :py:obj:`ADDITIONAL_UNITS` and the lowest weighting is</span>
    210. 

  210. <span class="sd">    given to the symbols resulting from the aliases :py:obj:`ALIAS_SYMBOLS`.</span>
    211. 

  211. 

  212. <span class="sd">    &quot;&quot;&quot;</span>
    213. 

  213. 

  214.     <span class="k">global</span> <span class="n">SYMBOL_TO_SI</span>  <span class="c1"># pylint: disable=global-statement</span>
    215. 

  215.     <span class="k">if</span> <span class="n">SYMBOL_TO_SI</span><span class="p">:</span>
    216. 

  216.         <span class="k">return</span> <span class="n">SYMBOL_TO_SI</span>
    217. 

  217. 

  218.     <span class="c1"># filter out units which can&#39;t be normalized to a SI unit and filter out</span>
    219. 

  219.     <span class="c1"># units without a symbol / arcsecond does not have a symbol</span>
    220. 

  220.     <span class="c1"># https://www.wikidata.org/wiki/Q829073</span>
    221. 

  221. 

  222.     <span class="k">for</span> <span class="n">item</span> <span class="ow">in</span> <span class="n">data</span><span class="o">.</span><span class="n">WIKIDATA_UNITS</span><span class="o">.</span><span class="n">values</span><span class="p">():</span>
    223. 

  223.         <span class="k">if</span> <span class="n">item</span><span class="p">[</span><span class="s1">&#39;to_si_factor&#39;</span><span class="p">]</span> <span class="ow">and</span> <span class="n">item</span><span class="p">[</span><span class="s1">&#39;symbol&#39;</span><span class="p">]:</span>
    224. 

  224.             <span class="n">SYMBOL_TO_SI</span><span class="o">.</span><span class="n">append</span><span class="p">(</span>
    225. 

  225.                 <span class="p">(</span>
    226. 

  226.                     <span class="n">item</span><span class="p">[</span><span class="s1">&#39;symbol&#39;</span><span class="p">],</span>
    227. 

  227.                     <span class="n">item</span><span class="p">[</span><span class="s1">&#39;si_name&#39;</span><span class="p">],</span>
    228. 

  228.                     <span class="mi">1</span> <span class="o">/</span> <span class="n">item</span><span class="p">[</span><span class="s1">&#39;to_si_factor&#39;</span><span class="p">],</span>  <span class="c1"># from_si</span>
    229. 

  229.                     <span class="n">item</span><span class="p">[</span><span class="s1">&#39;to_si_factor&#39;</span><span class="p">],</span>  <span class="c1"># to_si</span>
    230. 

  230.                     <span class="n">item</span><span class="p">[</span><span class="s1">&#39;symbol&#39;</span><span class="p">],</span>
    231. 

  231.                 <span class="p">)</span>
    232. 

  232.             <span class="p">)</span>
    233. 

  233. 

  234.     <span class="k">for</span> <span class="n">item</span> <span class="ow">in</span> <span class="n">ADDITIONAL_UNITS</span><span class="p">:</span>
    235. 

  235.         <span class="n">SYMBOL_TO_SI</span><span class="o">.</span><span class="n">append</span><span class="p">(</span>
    236. 

  236.             <span class="p">(</span>
    237. 

  237.                 <span class="n">item</span><span class="p">[</span><span class="s1">&#39;symbol&#39;</span><span class="p">],</span>
    238. 

  238.                 <span class="n">item</span><span class="p">[</span><span class="s1">&#39;si_name&#39;</span><span class="p">],</span>
    239. 

  239.                 <span class="n">item</span><span class="p">[</span><span class="s1">&#39;from_si&#39;</span><span class="p">],</span>
    240. 

  240.                 <span class="n">item</span><span class="p">[</span><span class="s1">&#39;to_si&#39;</span><span class="p">],</span>
    241. 

  241.                 <span class="n">item</span><span class="p">[</span><span class="s1">&#39;symbol&#39;</span><span class="p">],</span>
    242. 

  242.             <span class="p">)</span>
    243. 

  243.         <span class="p">)</span>
    244. 

  244. 

  245.     <span class="n">alias_items</span> <span class="o">=</span> <span class="p">[]</span>
    246. 

  246.     <span class="k">for</span> <span class="n">item</span> <span class="ow">in</span> <span class="n">SYMBOL_TO_SI</span><span class="p">:</span>
    247. 

  247.         <span class="k">for</span> <span class="n">alias</span> <span class="ow">in</span> <span class="n">ALIAS_SYMBOLS</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="n">item</span><span class="p">[</span><span class="mi">0</span><span class="p">],</span> <span class="p">()):</span>
    248. 

  248.             <span class="n">alias_items</span><span class="o">.</span><span class="n">append</span><span class="p">(</span>
    249. 

  249.                 <span class="p">(</span>
    250. 

  250.                     <span class="n">alias</span><span class="p">,</span>
    251. 

  251.                     <span class="n">item</span><span class="p">[</span><span class="mi">1</span><span class="p">],</span>
    252. 

  252.                     <span class="n">item</span><span class="p">[</span><span class="mi">2</span><span class="p">],</span>  <span class="c1"># from_si</span>
    253. 

  253.                     <span class="n">item</span><span class="p">[</span><span class="mi">3</span><span class="p">],</span>  <span class="c1"># to_si</span>
    254. 

  254.                     <span class="n">item</span><span class="p">[</span><span class="mi">0</span><span class="p">],</span>  <span class="c1"># origin unit</span>
    255. 

  255.                 <span class="p">)</span>
    256. 

  256.             <span class="p">)</span>
    257. 

  257.     <span class="n">SYMBOL_TO_SI</span> <span class="o">=</span> <span class="n">SYMBOL_TO_SI</span> <span class="o">+</span> <span class="n">alias_items</span>
    258. 

  258.     <span class="k">return</span> <span class="n">SYMBOL_TO_SI</span></div>
    259. 

  259. 

  260. 

  261. 

  262. <span class="k">def</span><span class="w"> </span><span class="nf">_parse_text_and_convert</span><span class="p">(</span><span class="n">from_query</span><span class="p">,</span> <span class="n">to_query</span><span class="p">)</span> <span class="o">-&gt;</span> <span class="nb">str</span> <span class="o">|</span> <span class="kc">None</span><span class="p">:</span>
    263. 

  263. 

  264.     <span class="c1"># pylint: disable=too-many-branches, too-many-locals</span>
    265. 

  265. 

  266.     <span class="k">if</span> <span class="ow">not</span> <span class="p">(</span><span class="n">from_query</span> <span class="ow">and</span> <span class="n">to_query</span><span class="p">):</span>
    267. 

  267.         <span class="k">return</span> <span class="kc">None</span>
    268. 

  268. 

  269.     <span class="n">measured</span> <span class="o">=</span> <span class="n">re</span><span class="o">.</span><span class="n">match</span><span class="p">(</span><span class="n">RE_MEASURE</span><span class="p">,</span> <span class="n">from_query</span><span class="p">,</span> <span class="n">re</span><span class="o">.</span><span class="n">VERBOSE</span><span class="p">)</span>
    270. 

  270.     <span class="k">if</span> <span class="ow">not</span> <span class="p">(</span><span class="n">measured</span> <span class="ow">and</span> <span class="n">measured</span><span class="o">.</span><span class="n">group</span><span class="p">(</span><span class="s1">&#39;number&#39;</span><span class="p">),</span> <span class="n">measured</span><span class="o">.</span><span class="n">group</span><span class="p">(</span><span class="s1">&#39;unit&#39;</span><span class="p">)):</span>
    271. 

  271.         <span class="k">return</span> <span class="kc">None</span>
    272. 

  272. 

  273.     <span class="c1"># Symbols are not unique, if there are several hits for the from-unit, then</span>
    274. 

  274.     <span class="c1"># the correct one must be determined by comparing it with the to-unit</span>
    275. 

  275.     <span class="c1"># https://github.com/searxng/searxng/pull/3378#issuecomment-2080974863</span>
    276. 

  276. 

  277.     <span class="c1"># first: collecting possible units</span>
    278. 

  278. 

  279.     <span class="n">source_list</span><span class="p">,</span> <span class="n">target_list</span> <span class="o">=</span> <span class="p">[],</span> <span class="p">[]</span>
    280. 

  280. 

  281.     <span class="k">for</span> <span class="n">symbol</span><span class="p">,</span> <span class="n">si_name</span><span class="p">,</span> <span class="n">from_si</span><span class="p">,</span> <span class="n">to_si</span><span class="p">,</span> <span class="n">orig_symbol</span> <span class="ow">in</span> <span class="n">symbol_to_si</span><span class="p">():</span>
    282. 

  282. 

  283.         <span class="k">if</span> <span class="n">symbol</span> <span class="o">==</span> <span class="n">measured</span><span class="o">.</span><span class="n">group</span><span class="p">(</span><span class="s1">&#39;unit&#39;</span><span class="p">):</span>
    284. 

  284.             <span class="n">source_list</span><span class="o">.</span><span class="n">append</span><span class="p">((</span><span class="n">si_name</span><span class="p">,</span> <span class="n">to_si</span><span class="p">))</span>
    285. 

  285.         <span class="k">if</span> <span class="n">symbol</span> <span class="o">==</span> <span class="n">to_query</span><span class="p">:</span>
    286. 

  286.             <span class="n">target_list</span><span class="o">.</span><span class="n">append</span><span class="p">((</span><span class="n">si_name</span><span class="p">,</span> <span class="n">from_si</span><span class="p">,</span> <span class="n">orig_symbol</span><span class="p">))</span>
    287. 

  287. 

  288.     <span class="k">if</span> <span class="ow">not</span> <span class="p">(</span><span class="n">source_list</span> <span class="ow">and</span> <span class="n">target_list</span><span class="p">):</span>
    289. 

  289.         <span class="k">return</span> <span class="kc">None</span>
    290. 

  290. 

  291.     <span class="n">source_to_si</span> <span class="o">=</span> <span class="n">target_from_si</span> <span class="o">=</span> <span class="n">target_symbol</span> <span class="o">=</span> <span class="kc">None</span>
    292. 

  292. 

  293.     <span class="c1"># second: find the right unit by comparing list of from-units with list of to-units</span>
    294. 

  294. 

  295.     <span class="k">for</span> <span class="n">source</span> <span class="ow">in</span> <span class="n">source_list</span><span class="p">:</span>
    296. 

  296.         <span class="k">for</span> <span class="n">target</span> <span class="ow">in</span> <span class="n">target_list</span><span class="p">:</span>
    297. 

  297.             <span class="k">if</span> <span class="n">source</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span> <span class="o">==</span> <span class="n">target</span><span class="p">[</span><span class="mi">0</span><span class="p">]:</span>  <span class="c1"># compare si_name</span>
    298. 

  298.                 <span class="n">source_to_si</span> <span class="o">=</span> <span class="n">source</span><span class="p">[</span><span class="mi">1</span><span class="p">]</span>
    299. 

  299.                 <span class="n">target_from_si</span> <span class="o">=</span> <span class="n">target</span><span class="p">[</span><span class="mi">1</span><span class="p">]</span>
    300. 

  300.                 <span class="n">target_symbol</span> <span class="o">=</span> <span class="n">target</span><span class="p">[</span><span class="mi">2</span><span class="p">]</span>
    301. 

  301. 

  302.     <span class="k">if</span> <span class="ow">not</span> <span class="p">(</span><span class="n">source_to_si</span> <span class="ow">and</span> <span class="n">target_from_si</span><span class="p">):</span>
    303. 

  303.         <span class="k">return</span> <span class="kc">None</span>
    304. 

  304. 

  305.     <span class="n">_locale</span> <span class="o">=</span> <span class="n">get_locale</span><span class="p">()</span> <span class="ow">or</span> <span class="s1">&#39;en_US&#39;</span>
    306. 

  306. 

  307.     <span class="n">value</span> <span class="o">=</span> <span class="n">measured</span><span class="o">.</span><span class="n">group</span><span class="p">(</span><span class="s1">&#39;sign&#39;</span><span class="p">)</span> <span class="o">+</span> <span class="n">measured</span><span class="o">.</span><span class="n">group</span><span class="p">(</span><span class="s1">&#39;number&#39;</span><span class="p">)</span> <span class="o">+</span> <span class="p">(</span><span class="n">measured</span><span class="o">.</span><span class="n">group</span><span class="p">(</span><span class="s1">&#39;E&#39;</span><span class="p">)</span> <span class="ow">or</span> <span class="s1">&#39;&#39;</span><span class="p">)</span>
    308. 

  308.     <span class="n">value</span> <span class="o">=</span> <span class="n">babel</span><span class="o">.</span><span class="n">numbers</span><span class="o">.</span><span class="n">parse_decimal</span><span class="p">(</span><span class="n">value</span><span class="p">,</span> <span class="n">locale</span><span class="o">=</span><span class="n">_locale</span><span class="p">)</span>
    309. 

  309. 

  310.     <span class="c1"># convert value to SI unit</span>
    311. 

  311. 

  312.     <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">source_to_si</span><span class="p">,</span> <span class="p">(</span><span class="nb">float</span><span class="p">,</span> <span class="nb">int</span><span class="p">)):</span>
    313. 

  313.         <span class="n">value</span> <span class="o">=</span> <span class="nb">float</span><span class="p">(</span><span class="n">value</span><span class="p">)</span> <span class="o">*</span> <span class="n">source_to_si</span>
    314. 

  314.     <span class="k">else</span><span class="p">:</span>
    315. 

  315.         <span class="n">value</span> <span class="o">=</span> <span class="n">source_to_si</span><span class="p">(</span><span class="nb">float</span><span class="p">(</span><span class="n">value</span><span class="p">))</span>
    316. 

  316. 

  317.     <span class="c1"># convert value from SI unit to target unit</span>
    318. 

  318. 

  319.     <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">target_from_si</span><span class="p">,</span> <span class="p">(</span><span class="nb">float</span><span class="p">,</span> <span class="nb">int</span><span class="p">)):</span>
    320. 

  320.         <span class="n">value</span> <span class="o">=</span> <span class="nb">float</span><span class="p">(</span><span class="n">value</span><span class="p">)</span> <span class="o">*</span> <span class="n">target_from_si</span>
    321. 

  321.     <span class="k">else</span><span class="p">:</span>
    322. 

  322.         <span class="n">value</span> <span class="o">=</span> <span class="n">target_from_si</span><span class="p">(</span><span class="nb">float</span><span class="p">(</span><span class="n">value</span><span class="p">))</span>
    323. 

  323. 

  324.     <span class="k">if</span> <span class="n">measured</span><span class="o">.</span><span class="n">group</span><span class="p">(</span><span class="s1">&#39;E&#39;</span><span class="p">):</span>
    325. 

  325.         <span class="c1"># when incoming notation is scientific, outgoing notation is scientific</span>
    326. 

  326.         <span class="n">result</span> <span class="o">=</span> <span class="n">babel</span><span class="o">.</span><span class="n">numbers</span><span class="o">.</span><span class="n">format_scientific</span><span class="p">(</span><span class="n">value</span><span class="p">,</span> <span class="n">locale</span><span class="o">=</span><span class="n">_locale</span><span class="p">)</span>
    327. 

  327.     <span class="k">else</span><span class="p">:</span>
    328. 

  328.         <span class="n">result</span> <span class="o">=</span> <span class="n">babel</span><span class="o">.</span><span class="n">numbers</span><span class="o">.</span><span class="n">format_decimal</span><span class="p">(</span><span class="n">value</span><span class="p">,</span> <span class="n">locale</span><span class="o">=</span><span class="n">_locale</span><span class="p">,</span> <span class="nb">format</span><span class="o">=</span><span class="s1">&#39;#,##0.##########;-#&#39;</span><span class="p">)</span>
    329. 

  329. 

  330.     <span class="k">return</span> <span class="sa">f</span><span class="s1">&#39;</span><span class="si">{</span><span class="n">result</span><span class="si">}</span><span class="s1"> </span><span class="si">{</span><span class="n">target_symbol</span><span class="si">}</span><span class="s1">&#39;</span>
    331. 

  331. </pre></div>
    332. 

  332. 

  333.             <div class="clearer"></div>
    334. 

  334.           </div>
    335. 

  335.         </div>
    336. 

  336.       </div>
    337. 

  337.   <span id="sidebar-top"></span>
    338. 

  338.       <div class="sphinxsidebar" role="navigation" aria-label="Main">
    339. 

  339.         <div class="sphinxsidebarwrapper">
    340. 

  340.   
    341. 

  341.     
    342. 

  342.             <p class="logo"><a href="../../../index.html">
    343. 

  343.               <img class="logo" src="../../../_static/searxng-wordmark.svg" alt="Logo of SearXNG"/>
    344. 

  344.             </a></p>
    345. 

  345.   
    346. 

  346. 

  347. <h3><a href="../../../index.html">Table of Contents</a></h3>
    348. 

  348. <ul>
    349. 

  349. <li class="toctree-l1"><a class="reference internal" href="../../../user/index.html">User information</a></li>
    350. 

  350. <li class="toctree-l1"><a class="reference internal" href="../../../own-instance.html">Why use a private instance?</a></li>
    351. 

  351. <li class="toctree-l1"><a class="reference internal" href="../../../admin/index.html">Administrator documentation</a></li>
    352. 

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    354. 

  354. <li class="toctree-l1"><a class="reference internal" href="../../../src/index.html">Source-Code</a></li>
    355. 

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    356. 

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  357.   <h3>Project Links</h3>
    358. 

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    359. 

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    360. 

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    366. 

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    370. 

  370.       <li><a href="../../index.html">Module code</a>
    371. 

  371.         
    372. 

  372.           
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  373.           </ul>
    374. 

  374.       </li>
    375. 

  375.     </ul>
    376. 

  376.   </li>
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  377. </ul>
    378. 

  378. <search id="searchbox" style="display: none" role="search">
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    380. 

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    382. 

  382.       <input type="text" name="q" aria-labelledby="searchlabel" autocomplete="off" autocorrect="off" autocapitalize="off" spellcheck="false"/>
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  383.       <input type="submit" value="Go" />
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    386. 

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  387. <script>document.getElementById('searchbox').style.display = "block"</script>
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    396. 

  396. </html>
    397.
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