duckduckgo may return something like ``<a href="xxxx">http://somewhere Related website<a/>`` The href URL is broken, the "Related website" may co

usage: ``engine_list = settings['engines']``

Last modification time of this property.

Performs maintenance on the cache

hl_lines in pygments are expected to be relative to the input

Parse and validate ``data`` and store the result at ``self.value``

Parse and validate ``data`` and store the result at ``self.value``

Parse and validate ``data`` and store the result at ``self.value``

parse (base64) preferences from request (``flask.request.form['preferences']``)

remove yahoo-specific tracking-url

Runs AFTER the search request. Can return a list of :py:obj:`Result <searx.result_types._base.Result>` objects to be added to the fin

Runs BEFORE the search request and returns a boolean: - ``True`` to continue the search - ``False`` to stop the search

Register a :py:obj:`Answerer`.

Removes unicode's "PRIVATE USE CHARACTER"s (PUA_) from a string. .. _PUA: https://en.wikipedia.org/wiki/Private_Use_Areas

Set data and mime-type in the cache. If data is None, the :py:obj:`FALLBACK_ICON` is registered. in the cache.

Set traits from self object in a :py:obj:`.Engine` namespace. :param engine: engine instance build by :py:func:`searx.engines.load_engine`

Generates a list of tuples, each tuple is a measure unit and the fields in the tuple are: 0. Symbol of the measure unit (e.g. 'mi' for measur