[pylint] Pylint 2.10 - fix use-list-literal & use-dict-literal

Pylint 2.10 added new default checks [1]:

use-list-literal
  Emitted when list() is called with no arguments instead of using []

use-dict-literal
  Emitted when dict() is called with no arguments instead of using {}

[1] https://pylint.pycqa.org/en/latest/whatsnew/2.10.html

Signed-off-by: Markus Heiser <markus.heiser@darmarit.de>

searx/engines/google_images.py

@@ -66,7 +66,7 @@ filter_mapping = {
 def scrap_out_thumbs(dom):
     """Scrap out thumbnail data from <script> tags.
     """
-    ret_val = dict()
+    ret_val = {}
     for script in eval_xpath(dom, '//script[contains(., "_setImgSrc(")]'):
         _script = script.text
         # _setImgSrc('0','data:image\/jpeg;base64,\/9j\/4AAQSkZJR ....');

searx/engines/google_videos.py

@@ -80,7 +80,7 @@ def _re(regexpr):
 def scrap_out_thumbs(dom):
     """Scrap out thumbnail data from <script> tags.
     """
-    ret_val = dict()
+    ret_val = {}
     thumb_name = 'vidthumb'
 
     for script in eval_xpath_list(dom, '//script[contains(., "_setImagesSrc")]'):

searx/engines/meilisearch.py

@@ -12,7 +12,7 @@ from json import loads, dumps
 base_url = 'http://localhost:7700'
 index = ''
 auth_key = ''
-facet_filters = list()
+facet_filters = []
 _search_url = ''
 result_template = 'key-value.html'
 categories = ['general']

searx/preferences.py

@@ -285,7 +285,7 @@ class EnginesSetting(SwitchableSetting):
         transformed_choices = []
         for engine_name, engine in self.choices.items():  # pylint: disable=no-member,access-member-before-definition
             for category in engine.categories:
-                transformed_choice = dict()
+                transformed_choice = {}
                 transformed_choice['default_on'] = not engine.disabled
                 transformed_choice['id'] = '{}__{}'.format(engine_name, category)
                 transformed_choices.append(transformed_choice)
@@ -296,7 +296,7 @@ class EnginesSetting(SwitchableSetting):
 
     def transform_values(self, values):
         if len(values) == 1 and next(iter(values)) == '':
-            return list()
+            return []
         transformed_values = []
         for value in values:
             engine, category = value.split('__')
@@ -311,7 +311,7 @@ class PluginsSetting(SwitchableSetting):
         super()._post_init()
         transformed_choices = []
         for plugin in self.choices:  # pylint: disable=access-member-before-definition
-            transformed_choice = dict()
+            transformed_choice = {}
             transformed_choice['default_on'] = plugin.default_on
             transformed_choice['id'] = plugin.id
             transformed_choices.append(transformed_choice)