[format.python] initial formatting of the python code

This patch was generated by black [1]::

    make format.python

[1] https://github.com/psf/black

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

searx/engines/demo_offline.py

@@ -31,6 +31,7 @@ about = {
 # if there is a need for globals, use a leading underline
 _my_offline_engine = None
 
+
 def init(engine_settings=None):
     """Initialization of the (offline) engine.  The origin of this demo engine is a
     simple json string which is loaded in this example while the engine is
@@ -44,11 +45,10 @@ def init(engine_settings=None):
         ', {"value":"first item"}'
         ', {"value":"second item"}'
         ', {"value":"third item"}'
-        ']'
-
-        % engine_settings.get('name')
+        ']' % engine_settings.get('name')
     )
 
+
 def search(query, request_params):
     """Query (offline) engine and return results.  Assemble the list of results from
     your local engine.  In this demo engine we ignore the 'query' term, usual
@@ -62,11 +62,11 @@ def search(query, request_params):
 
     for row in result_list:
         entry = {
-            'query' : query,
-            'language' : request_params['language'],
-            'value' : row.get("value"),
+            'query': query,
+            'language': request_params['language'],
+            'value': row.get("value"),
             # choose a result template or comment out to use the *default*
-            'template' : 'key-value.html',
+            'template': 'key-value.html',
         }
         ret_val.append(entry)