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<h1>Source code for searx.enginelib.traits</h1><div class="highlight"><pre>
<span></span><span class="c1"># SPDX-License-Identifier: AGPL-3.0-or-later</span>
<span class="sd">"""Engine's traits are fetched from the origin engines and stored in a JSON file</span>
<span class="sd">in the *data folder*. Most often traits are languages and region codes and</span>
<span class="sd">their mapping from SearXNG's representation to the representation in the origin</span>
<span class="sd">search engine. For new traits new properties can be added to the class</span>
<span class="sd">:py:class:`EngineTraits`.</span>
<span class="sd">To load traits from the persistence :py:obj:`EngineTraitsMap.from_data` can be</span>
<span class="sd">used.</span>
<span class="sd">"""</span>
<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>
<span class="kn">import</span><span class="w"> </span><span class="nn">os</span>
<span class="kn">import</span><span class="w"> </span><span class="nn">json</span>
<span class="kn">import</span><span class="w"> </span><span class="nn">dataclasses</span>
<span class="kn">import</span><span class="w"> </span><span class="nn">types</span>
<span class="kn">from</span><span class="w"> </span><span class="nn">typing</span><span class="w"> </span><span class="kn">import</span> <span class="n">Dict</span><span class="p">,</span> <span class="n">Literal</span><span class="p">,</span> <span class="n">Iterable</span><span class="p">,</span> <span class="n">Union</span><span class="p">,</span> <span class="n">Callable</span><span class="p">,</span> <span class="n">Optional</span><span class="p">,</span> <span class="n">TYPE_CHECKING</span>
<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">locales</span>
<span class="kn">from</span><span class="w"> </span><span class="nn">searx.data</span><span class="w"> </span><span class="kn">import</span> <span class="n">data_dir</span><span class="p">,</span> <span class="n">ENGINE_TRAITS</span>
<span class="k">if</span> <span class="n">TYPE_CHECKING</span><span class="p">:</span>
<span class="kn">from</span><span class="w"> </span><span class="nn">.</span><span class="w"> </span><span class="kn">import</span> <span class="n">Engine</span>
<div class="viewcode-block" id="EngineTraitsEncoder">
<a class="viewcode-back" href="../../../dev/engines/enginelib.html#searx.enginelib.traits.EngineTraitsEncoder">[docs]</a>
<span class="k">class</span><span class="w"> </span><span class="nc">EngineTraitsEncoder</span><span class="p">(</span><span class="n">json</span><span class="o">.</span><span class="n">JSONEncoder</span><span class="p">):</span>
<span class="w"> </span><span class="sd">"""Encodes :class:`EngineTraits` to a serializable object, see</span>
<span class="sd"> :class:`json.JSONEncoder`."""</span>
<div class="viewcode-block" id="EngineTraitsEncoder.default">
<a class="viewcode-back" href="../../../dev/engines/enginelib.html#searx.enginelib.traits.EngineTraitsEncoder.default">[docs]</a>
<span class="k">def</span><span class="w"> </span><span class="nf">default</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">o</span><span class="p">):</span>
<span class="w"> </span><span class="sd">"""Return dictionary of a :class:`EngineTraits` object."""</span>
<span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">o</span><span class="p">,</span> <span class="n">EngineTraits</span><span class="p">):</span>
<span class="k">return</span> <span class="n">o</span><span class="o">.</span><span class="vm">__dict__</span>
<span class="k">return</span> <span class="nb">super</span><span class="p">()</span><span class="o">.</span><span class="n">default</span><span class="p">(</span><span class="n">o</span><span class="p">)</span></div>
</div>
<div class="viewcode-block" id="EngineTraits">
<a class="viewcode-back" href="../../../dev/engines/enginelib.html#searx.enginelib.traits.EngineTraits">[docs]</a>
<span class="nd">@dataclasses</span><span class="o">.</span><span class="n">dataclass</span>
<span class="k">class</span><span class="w"> </span><span class="nc">EngineTraits</span><span class="p">:</span>
<span class="w"> </span><span class="sd">"""The class is intended to be instantiated for each engine."""</span>
<span class="n">regions</span><span class="p">:</span> <span class="n">Dict</span><span class="p">[</span><span class="nb">str</span><span class="p">,</span> <span class="nb">str</span><span class="p">]</span> <span class="o">=</span> <span class="n">dataclasses</span><span class="o">.</span><span class="n">field</span><span class="p">(</span><span class="n">default_factory</span><span class="o">=</span><span class="nb">dict</span><span class="p">)</span>
<span class="w"> </span><span class="sd">"""Maps SearXNG's internal representation of a region to the one of the engine.</span>
<span class="sd"> SearXNG's internal representation can be parsed by babel and the value is</span>
<span class="sd"> send to the engine:</span>
<span class="sd"> .. code:: python</span>
<span class="sd"> regions ={</span>
<span class="sd"> 'fr-BE' : <engine's region name>,</span>
<span class="sd"> }</span>
<span class="sd"> for key, egnine_region regions.items():</span>
<span class="sd"> searxng_region = babel.Locale.parse(key, sep='-')</span>
<span class="sd"> ...</span>
<span class="sd"> """</span>
<span class="n">languages</span><span class="p">:</span> <span class="n">Dict</span><span class="p">[</span><span class="nb">str</span><span class="p">,</span> <span class="nb">str</span><span class="p">]</span> <span class="o">=</span> <span class="n">dataclasses</span><span class="o">.</span><span class="n">field</span><span class="p">(</span><span class="n">default_factory</span><span class="o">=</span><span class="nb">dict</span><span class="p">)</span>
<span class="w"> </span><span class="sd">"""Maps SearXNG's internal representation of a language to the one of the engine.</span>
<span class="sd"> SearXNG's internal representation can be parsed by babel and the value is</span>
<span class="sd"> send to the engine:</span>
<span class="sd"> .. code:: python</span>
<span class="sd"> languages = {</span>
<span class="sd"> 'ca' : <engine's language name>,</span>
<span class="sd"> }</span>
<span class="sd"> for key, egnine_lang in languages.items():</span>
<span class="sd"> searxng_lang = babel.Locale.parse(key)</span>
<span class="sd"> ...</span>
<span class="sd"> """</span>
<span class="n">all_locale</span><span class="p">:</span> <span class="n">Optional</span><span class="p">[</span><span class="nb">str</span><span class="p">]</span> <span class="o">=</span> <span class="kc">None</span>
<span class="w"> </span><span class="sd">"""To which locale value SearXNG's ``all`` language is mapped (shown a "Default</span>
<span class="sd"> language").</span>
<span class="sd"> """</span>
<span class="n">data_type</span><span class="p">:</span> <span class="n">Literal</span><span class="p">[</span><span class="s1">'traits_v1'</span><span class="p">]</span> <span class="o">=</span> <span class="s1">'traits_v1'</span>
<span class="w"> </span><span class="sd">"""Data type, default is 'traits_v1'.</span>
<span class="sd"> """</span>
<span class="n">custom</span><span class="p">:</span> <span class="n">Dict</span><span class="p">[</span><span class="nb">str</span><span class="p">,</span> <span class="n">Union</span><span class="p">[</span><span class="n">Dict</span><span class="p">[</span><span class="nb">str</span><span class="p">,</span> <span class="n">Dict</span><span class="p">],</span> <span class="n">Iterable</span><span class="p">[</span><span class="nb">str</span><span class="p">]]]</span> <span class="o">=</span> <span class="n">dataclasses</span><span class="o">.</span><span class="n">field</span><span class="p">(</span><span class="n">default_factory</span><span class="o">=</span><span class="nb">dict</span><span class="p">)</span>
<span class="w"> </span><span class="sd">"""A place to store engine's custom traits, not related to the SearXNG core.</span>
<span class="sd"> """</span>
<div class="viewcode-block" id="EngineTraits.get_language">
<a class="viewcode-back" href="../../../dev/engines/enginelib.html#searx.enginelib.traits.EngineTraits.get_language">[docs]</a>
<span class="k">def</span><span class="w"> </span><span class="nf">get_language</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">searxng_locale</span><span class="p">:</span> <span class="nb">str</span><span class="p">,</span> <span class="n">default</span><span class="o">=</span><span class="kc">None</span><span class="p">):</span>
<span class="w"> </span><span class="sd">"""Return engine's language string that *best fits* to SearXNG's locale.</span>
<span class="sd"> :param searxng_locale: SearXNG's internal representation of locale</span>
<span class="sd"> selected by the user.</span>
<span class="sd"> :param default: engine's default language</span>
<span class="sd"> The *best fits* rules are implemented in</span>
<span class="sd"> :py:obj:`searx.locales.get_engine_locale`. Except for the special value ``all``</span>
<span class="sd"> which is determined from :py:obj:`EngineTraits.all_locale`.</span>
<span class="sd"> """</span>
<span class="k">if</span> <span class="n">searxng_locale</span> <span class="o">==</span> <span class="s1">'all'</span> <span class="ow">and</span> <span class="bp">self</span><span class="o">.</span><span class="n">all_locale</span> <span class="ow">is</span> <span class="ow">not</span> <span class="kc">None</span><span class="p">:</span>
<span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">all_locale</span>
<span class="k">return</span> <span class="n">locales</span><span class="o">.</span><span class="n">get_engine_locale</span><span class="p">(</span><span class="n">searxng_locale</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">languages</span><span class="p">,</span> <span class="n">default</span><span class="o">=</span><span class="n">default</span><span class="p">)</span></div>
<div class="viewcode-block" id="EngineTraits.get_region">
<a class="viewcode-back" href="../../../dev/engines/enginelib.html#searx.enginelib.traits.EngineTraits.get_region">[docs]</a>
<span class="k">def</span><span class="w"> </span><span class="nf">get_region</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">searxng_locale</span><span class="p">:</span> <span class="nb">str</span><span class="p">,</span> <span class="n">default</span><span class="o">=</span><span class="kc">None</span><span class="p">):</span>
<span class="w"> </span><span class="sd">"""Return engine's region string that best fits to SearXNG's locale.</span>
<span class="sd"> :param searxng_locale: SearXNG's internal representation of locale</span>
<span class="sd"> selected by the user.</span>
<span class="sd"> :param default: engine's default region</span>
<span class="sd"> The *best fits* rules are implemented in</span>
<span class="sd"> :py:obj:`searx.locales.get_engine_locale`. Except for the special value ``all``</span>
<span class="sd"> which is determined from :py:obj:`EngineTraits.all_locale`.</span>
<span class="sd"> """</span>
<span class="k">if</span> <span class="n">searxng_locale</span> <span class="o">==</span> <span class="s1">'all'</span> <span class="ow">and</span> <span class="bp">self</span><span class="o">.</span><span class="n">all_locale</span> <span class="ow">is</span> <span class="ow">not</span> <span class="kc">None</span><span class="p">:</span>
<span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">all_locale</span>
<span class="k">return</span> <span class="n">locales</span><span class="o">.</span><span class="n">get_engine_locale</span><span class="p">(</span><span class="n">searxng_locale</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">regions</span><span class="p">,</span> <span class="n">default</span><span class="o">=</span><span class="n">default</span><span class="p">)</span></div>
<div class="viewcode-block" id="EngineTraits.is_locale_supported">
<a class="viewcode-back" href="../../../dev/engines/enginelib.html#searx.enginelib.traits.EngineTraits.is_locale_supported">[docs]</a>
<span class="k">def</span><span class="w"> </span><span class="nf">is_locale_supported</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">searxng_locale</span><span class="p">:</span> <span class="nb">str</span><span class="p">)</span> <span class="o">-></span> <span class="nb">bool</span><span class="p">:</span>
<span class="w"> </span><span class="sd">"""A *locale* (SearXNG's internal representation) is considered to be</span>
<span class="sd"> supported by the engine if the *region* or the *language* is supported</span>
<span class="sd"> by the engine.</span>
<span class="sd"> For verification the functions :py:func:`EngineTraits.get_region` and</span>
<span class="sd"> :py:func:`EngineTraits.get_language` are used.</span>
<span class="sd"> """</span>
<span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">data_type</span> <span class="o">==</span> <span class="s1">'traits_v1'</span><span class="p">:</span>
<span class="k">return</span> <span class="nb">bool</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">get_region</span><span class="p">(</span><span class="n">searxng_locale</span><span class="p">)</span> <span class="ow">or</span> <span class="bp">self</span><span class="o">.</span><span class="n">get_language</span><span class="p">(</span><span class="n">searxng_locale</span><span class="p">))</span>
<span class="k">raise</span> <span class="ne">TypeError</span><span class="p">(</span><span class="s1">'engine traits of type </span><span class="si">%s</span><span class="s1"> is unknown'</span> <span class="o">%</span> <span class="bp">self</span><span class="o">.</span><span class="n">data_type</span><span class="p">)</span></div>
<div class="viewcode-block" id="EngineTraits.copy">
<a class="viewcode-back" href="../../../dev/engines/enginelib.html#searx.enginelib.traits.EngineTraits.copy">[docs]</a>
<span class="k">def</span><span class="w"> </span><span class="nf">copy</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="w"> </span><span class="sd">"""Create a copy of the dataclass object."""</span>
<span class="k">return</span> <span class="n">EngineTraits</span><span class="p">(</span><span class="o">**</span><span class="n">dataclasses</span><span class="o">.</span><span class="n">asdict</span><span class="p">(</span><span class="bp">self</span><span class="p">))</span></div>
<div class="viewcode-block" id="EngineTraits.fetch_traits">
<a class="viewcode-back" href="../../../dev/engines/enginelib.html#searx.enginelib.traits.EngineTraits.fetch_traits">[docs]</a>
<span class="nd">@classmethod</span>
<span class="k">def</span><span class="w"> </span><span class="nf">fetch_traits</span><span class="p">(</span><span class="bp">cls</span><span class="p">,</span> <span class="n">engine</span><span class="p">:</span> <span class="n">Engine</span><span class="p">)</span> <span class="o">-></span> <span class="n">Union</span><span class="p">[</span><span class="s1">'EngineTraits'</span><span class="p">,</span> <span class="kc">None</span><span class="p">]:</span>
<span class="w"> </span><span class="sd">"""Call a function ``fetch_traits(engine_traits)`` from engines namespace to fetch</span>
<span class="sd"> and set properties from the origin engine in the object ``engine_traits``. If</span>
<span class="sd"> function does not exists, ``None`` is returned.</span>
<span class="sd"> """</span>
<span class="n">fetch_traits</span> <span class="o">=</span> <span class="nb">getattr</span><span class="p">(</span><span class="n">engine</span><span class="p">,</span> <span class="s1">'fetch_traits'</span><span class="p">,</span> <span class="kc">None</span><span class="p">)</span>
<span class="n">engine_traits</span> <span class="o">=</span> <span class="kc">None</span>
<span class="k">if</span> <span class="n">fetch_traits</span><span class="p">:</span>
<span class="n">engine_traits</span> <span class="o">=</span> <span class="bp">cls</span><span class="p">()</span>
<span class="n">fetch_traits</span><span class="p">(</span><span class="n">engine_traits</span><span class="p">)</span>
<span class="k">return</span> <span class="n">engine_traits</span></div>
<div class="viewcode-block" id="EngineTraits.set_traits">
<a class="viewcode-back" href="../../../dev/engines/enginelib.html#searx.enginelib.traits.EngineTraits.set_traits">[docs]</a>
<span class="k">def</span><span class="w"> </span><span class="nf">set_traits</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">engine</span><span class="p">:</span> <span class="n">Engine</span><span class="p">):</span>
<span class="w"> </span><span class="sd">"""Set traits from self object in a :py:obj:`.Engine` namespace.</span>
<span class="sd"> :param engine: engine instance build by :py:func:`searx.engines.load_engine`</span>
<span class="sd"> """</span>
<span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">data_type</span> <span class="o">==</span> <span class="s1">'traits_v1'</span><span class="p">:</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_set_traits_v1</span><span class="p">(</span><span class="n">engine</span><span class="p">)</span>
<span class="k">else</span><span class="p">:</span>
<span class="k">raise</span> <span class="ne">TypeError</span><span class="p">(</span><span class="s1">'engine traits of type </span><span class="si">%s</span><span class="s1"> is unknown'</span> <span class="o">%</span> <span class="bp">self</span><span class="o">.</span><span class="n">data_type</span><span class="p">)</span></div>
<span class="k">def</span><span class="w"> </span><span class="nf">_set_traits_v1</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">engine</span><span class="p">:</span> <span class="n">Engine</span><span class="p">):</span>
<span class="c1"># For an engine, when there is `language: ...` in the YAML settings the engine</span>
<span class="c1"># does support only this one language (region)::</span>
<span class="c1">#</span>
<span class="c1"># - name: google italian</span>
<span class="c1"># engine: google</span>
<span class="c1"># language: it</span>
<span class="c1"># region: it-IT # type: ignore</span>
<span class="n">traits</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">copy</span><span class="p">()</span>
<span class="n">_msg</span> <span class="o">=</span> <span class="s2">"settings.yml - engine: '</span><span class="si">%s</span><span class="s2">' / </span><span class="si">%s</span><span class="s2">: '</span><span class="si">%s</span><span class="s2">' not supported"</span>
<span class="n">languages</span> <span class="o">=</span> <span class="n">traits</span><span class="o">.</span><span class="n">languages</span>
<span class="k">if</span> <span class="nb">hasattr</span><span class="p">(</span><span class="n">engine</span><span class="p">,</span> <span class="s1">'language'</span><span class="p">):</span>
<span class="k">if</span> <span class="n">engine</span><span class="o">.</span><span class="n">language</span> <span class="ow">not</span> <span class="ow">in</span> <span class="n">languages</span><span class="p">:</span>
<span class="k">raise</span> <span class="ne">ValueError</span><span class="p">(</span><span class="n">_msg</span> <span class="o">%</span> <span class="p">(</span><span class="n">engine</span><span class="o">.</span><span class="n">name</span><span class="p">,</span> <span class="s1">'language'</span><span class="p">,</span> <span class="n">engine</span><span class="o">.</span><span class="n">language</span><span class="p">))</span>
<span class="n">traits</span><span class="o">.</span><span class="n">languages</span> <span class="o">=</span> <span class="p">{</span><span class="n">engine</span><span class="o">.</span><span class="n">language</span><span class="p">:</span> <span class="n">languages</span><span class="p">[</span><span class="n">engine</span><span class="o">.</span><span class="n">language</span><span class="p">]}</span>
<span class="n">regions</span> <span class="o">=</span> <span class="n">traits</span><span class="o">.</span><span class="n">regions</span>
<span class="k">if</span> <span class="nb">hasattr</span><span class="p">(</span><span class="n">engine</span><span class="p">,</span> <span class="s1">'region'</span><span class="p">):</span>
<span class="k">if</span> <span class="n">engine</span><span class="o">.</span><span class="n">region</span> <span class="ow">not</span> <span class="ow">in</span> <span class="n">regions</span><span class="p">:</span>
<span class="k">raise</span> <span class="ne">ValueError</span><span class="p">(</span><span class="n">_msg</span> <span class="o">%</span> <span class="p">(</span><span class="n">engine</span><span class="o">.</span><span class="n">name</span><span class="p">,</span> <span class="s1">'region'</span><span class="p">,</span> <span class="n">engine</span><span class="o">.</span><span class="n">region</span><span class="p">))</span>
<span class="n">traits</span><span class="o">.</span><span class="n">regions</span> <span class="o">=</span> <span class="p">{</span><span class="n">engine</span><span class="o">.</span><span class="n">region</span><span class="p">:</span> <span class="n">regions</span><span class="p">[</span><span class="n">engine</span><span class="o">.</span><span class="n">region</span><span class="p">]}</span>
<span class="n">engine</span><span class="o">.</span><span class="n">language_support</span> <span class="o">=</span> <span class="nb">bool</span><span class="p">(</span><span class="n">traits</span><span class="o">.</span><span class="n">languages</span> <span class="ow">or</span> <span class="n">traits</span><span class="o">.</span><span class="n">regions</span><span class="p">)</span>
<span class="c1"># set the copied & modified traits in engine's namespace</span>
<span class="n">engine</span><span class="o">.</span><span class="n">traits</span> <span class="o">=</span> <span class="n">traits</span></div>
<div class="viewcode-block" id="EngineTraitsMap">
<a class="viewcode-back" href="../../../dev/engines/enginelib.html#searx.enginelib.traits.EngineTraitsMap">[docs]</a>
<span class="k">class</span><span class="w"> </span><span class="nc">EngineTraitsMap</span><span class="p">(</span><span class="n">Dict</span><span class="p">[</span><span class="nb">str</span><span class="p">,</span> <span class="n">EngineTraits</span><span class="p">]):</span>
<span class="w"> </span><span class="sd">"""A python dictionary to map :class:`EngineTraits` by engine name."""</span>
<span class="n">ENGINE_TRAITS_FILE</span> <span class="o">=</span> <span class="p">(</span><span class="n">data_dir</span> <span class="o">/</span> <span class="s1">'engine_traits.json'</span><span class="p">)</span><span class="o">.</span><span class="n">resolve</span><span class="p">()</span>
<span class="w"> </span><span class="sd">"""File with persistence of the :py:obj:`EngineTraitsMap`."""</span>
<div class="viewcode-block" id="EngineTraitsMap.save_data">
<a class="viewcode-back" href="../../../dev/engines/enginelib.html#searx.enginelib.traits.EngineTraitsMap.save_data">[docs]</a>
<span class="k">def</span><span class="w"> </span><span class="nf">save_data</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="w"> </span><span class="sd">"""Store EngineTraitsMap in in file :py:obj:`self.ENGINE_TRAITS_FILE`"""</span>
<span class="k">with</span> <span class="nb">open</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">ENGINE_TRAITS_FILE</span><span class="p">,</span> <span class="s1">'w'</span><span class="p">,</span> <span class="n">encoding</span><span class="o">=</span><span class="s1">'utf-8'</span><span class="p">)</span> <span class="k">as</span> <span class="n">f</span><span class="p">:</span>
<span class="n">json</span><span class="o">.</span><span class="n">dump</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">f</span><span class="p">,</span> <span class="n">indent</span><span class="o">=</span><span class="mi">2</span><span class="p">,</span> <span class="n">sort_keys</span><span class="o">=</span><span class="kc">True</span><span class="p">,</span> <span class="bp">cls</span><span class="o">=</span><span class="n">EngineTraitsEncoder</span><span class="p">)</span></div>
<div class="viewcode-block" id="EngineTraitsMap.from_data">
<a class="viewcode-back" href="../../../dev/engines/enginelib.html#searx.enginelib.traits.EngineTraitsMap.from_data">[docs]</a>
<span class="nd">@classmethod</span>
<span class="k">def</span><span class="w"> </span><span class="nf">from_data</span><span class="p">(</span><span class="bp">cls</span><span class="p">)</span> <span class="o">-></span> <span class="s1">'EngineTraitsMap'</span><span class="p">:</span>
<span class="w"> </span><span class="sd">"""Instantiate :class:`EngineTraitsMap` object from :py:obj:`ENGINE_TRAITS`"""</span>
<span class="n">obj</span> <span class="o">=</span> <span class="bp">cls</span><span class="p">()</span>
<span class="k">for</span> <span class="n">k</span><span class="p">,</span> <span class="n">v</span> <span class="ow">in</span> <span class="n">ENGINE_TRAITS</span><span class="o">.</span><span class="n">items</span><span class="p">():</span>
<span class="n">obj</span><span class="p">[</span><span class="n">k</span><span class="p">]</span> <span class="o">=</span> <span class="n">EngineTraits</span><span class="p">(</span><span class="o">**</span><span class="n">v</span><span class="p">)</span>
<span class="k">return</span> <span class="n">obj</span></div>
<span class="nd">@classmethod</span>
<span class="k">def</span><span class="w"> </span><span class="nf">fetch_traits</span><span class="p">(</span><span class="bp">cls</span><span class="p">,</span> <span class="n">log</span><span class="p">:</span> <span class="n">Callable</span><span class="p">)</span> <span class="o">-></span> <span class="s1">'EngineTraitsMap'</span><span class="p">:</span>
<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">engines</span> <span class="c1"># pylint: disable=cyclic-import, import-outside-toplevel</span>
<span class="n">names</span> <span class="o">=</span> <span class="nb">list</span><span class="p">(</span><span class="n">engines</span><span class="o">.</span><span class="n">engines</span><span class="p">)</span>
<span class="n">names</span><span class="o">.</span><span class="n">sort</span><span class="p">()</span>
<span class="n">obj</span> <span class="o">=</span> <span class="bp">cls</span><span class="p">()</span>
<span class="k">for</span> <span class="n">engine_name</span> <span class="ow">in</span> <span class="n">names</span><span class="p">:</span>
<span class="n">engine</span> <span class="o">=</span> <span class="n">engines</span><span class="o">.</span><span class="n">engines</span><span class="p">[</span><span class="n">engine_name</span><span class="p">]</span>
<span class="n">traits</span> <span class="o">=</span> <span class="kc">None</span>
<span class="c1"># pylint: disable=broad-exception-caught</span>
<span class="k">try</span><span class="p">:</span>
<span class="n">traits</span> <span class="o">=</span> <span class="n">EngineTraits</span><span class="o">.</span><span class="n">fetch_traits</span><span class="p">(</span><span class="n">engine</span><span class="p">)</span>
<span class="k">except</span> <span class="ne">Exception</span> <span class="k">as</span> <span class="n">exc</span><span class="p">:</span>
<span class="n">log</span><span class="p">(</span><span class="s2">"FATAL: while fetch_traits </span><span class="si">%s</span><span class="s2">: </span><span class="si">%s</span><span class="s2">"</span> <span class="o">%</span> <span class="p">(</span><span class="n">engine_name</span><span class="p">,</span> <span class="n">exc</span><span class="p">))</span>
<span class="k">if</span> <span class="n">os</span><span class="o">.</span><span class="n">environ</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s1">'FORCE'</span><span class="p">,</span> <span class="s1">''</span><span class="p">)</span><span class="o">.</span><span class="n">lower</span><span class="p">()</span> <span class="ow">not</span> <span class="ow">in</span> <span class="p">[</span><span class="s1">'on'</span><span class="p">,</span> <span class="s1">'true'</span><span class="p">,</span> <span class="s1">'1'</span><span class="p">]:</span>
<span class="k">raise</span>
<span class="n">v</span> <span class="o">=</span> <span class="n">ENGINE_TRAITS</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="n">engine_name</span><span class="p">)</span>
<span class="k">if</span> <span class="n">v</span><span class="p">:</span>
<span class="n">log</span><span class="p">(</span><span class="s2">"FORCE: re-use old values from fetch_traits - ENGINE_TRAITS[</span><span class="si">%s</span><span class="s2">]"</span> <span class="o">%</span> <span class="n">engine_name</span><span class="p">)</span>
<span class="n">traits</span> <span class="o">=</span> <span class="n">EngineTraits</span><span class="p">(</span><span class="o">**</span><span class="n">v</span><span class="p">)</span>
<span class="k">if</span> <span class="n">traits</span> <span class="ow">is</span> <span class="ow">not</span> <span class="kc">None</span><span class="p">:</span>
<span class="n">log</span><span class="p">(</span><span class="s2">"</span><span class="si">%-20s</span><span class="s2">: SearXNG languages --> </span><span class="si">%s</span><span class="s2"> "</span> <span class="o">%</span> <span class="p">(</span><span class="n">engine_name</span><span class="p">,</span> <span class="nb">len</span><span class="p">(</span><span class="n">traits</span><span class="o">.</span><span class="n">languages</span><span class="p">)))</span>
<span class="n">log</span><span class="p">(</span><span class="s2">"</span><span class="si">%-20s</span><span class="s2">: SearXNG regions --> </span><span class="si">%s</span><span class="s2">"</span> <span class="o">%</span> <span class="p">(</span><span class="n">engine_name</span><span class="p">,</span> <span class="nb">len</span><span class="p">(</span><span class="n">traits</span><span class="o">.</span><span class="n">regions</span><span class="p">)))</span>
<span class="n">obj</span><span class="p">[</span><span class="n">engine_name</span><span class="p">]</span> <span class="o">=</span> <span class="n">traits</span>
<span class="k">return</span> <span class="n">obj</span>
<div class="viewcode-block" id="EngineTraitsMap.set_traits">
<a class="viewcode-back" href="../../../dev/engines/enginelib.html#searx.enginelib.traits.EngineTraitsMap.set_traits">[docs]</a>
<span class="k">def</span><span class="w"> </span><span class="nf">set_traits</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">engine</span><span class="p">:</span> <span class="n">Engine</span> <span class="o">|</span> <span class="n">types</span><span class="o">.</span><span class="n">ModuleType</span><span class="p">):</span>
<span class="w"> </span><span class="sd">"""Set traits in a :py:obj:`Engine` namespace.</span>
<span class="sd"> :param engine: engine instance build by :py:func:`searx.engines.load_engine`</span>
<span class="sd"> """</span>
<span class="n">engine_traits</span> <span class="o">=</span> <span class="n">EngineTraits</span><span class="p">(</span><span class="n">data_type</span><span class="o">=</span><span class="s1">'traits_v1'</span><span class="p">)</span>
<span class="k">if</span> <span class="n">engine</span><span class="o">.</span><span class="n">name</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">keys</span><span class="p">():</span>
<span class="n">engine_traits</span> <span class="o">=</span> <span class="bp">self</span><span class="p">[</span><span class="n">engine</span><span class="o">.</span><span class="n">name</span><span class="p">]</span>
<span class="k">elif</span> <span class="n">engine</span><span class="o">.</span><span class="n">engine</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">keys</span><span class="p">():</span>
<span class="c1"># The key of the dictionary traits_map is the *engine name*</span>
<span class="c1"># configured in settings.xml. When multiple engines are configured</span>
<span class="c1"># in settings.yml to use the same origin engine (python module)</span>
<span class="c1"># these additional engines can use the languages from the origin</span>
<span class="c1"># engine. For this use the configured ``engine: ...`` from</span>
<span class="c1"># settings.yml</span>
<span class="n">engine_traits</span> <span class="o">=</span> <span class="bp">self</span><span class="p">[</span><span class="n">engine</span><span class="o">.</span><span class="n">engine</span><span class="p">]</span>
<span class="n">engine_traits</span><span class="o">.</span><span class="n">set_traits</span><span class="p">(</span><span class="n">engine</span><span class="p">)</span></div>
</div>
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