[pylint] searx/engines/unsplash.py, add logger & norm indentation

- fix messages from pylint
- add logger and log request URL
- normalized various indentation

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

searx/engines/unsplash.py

@@ -1,11 +1,16 @@
 # SPDX-License-Identifier: AGPL-3.0-or-later
-"""
+# lint: pylint
- Unsplash
+# pylint: disable=missing-function-docstring
+"""Unsplash
+
 """
 
 from urllib.parse import urlencode, urlparse, urlunparse, parse_qsl
 from json import loads
 
+from searx import logger
+
+logger = logger.getChild('unsplash engine')
 # about
 about = {
     "website": 'https://unsplash.com',
@@ -16,8 +21,8 @@ about = {
     "results": 'JSON',
 }
 
-url = 'https://unsplash.com/'
+base_url = 'https://unsplash.com/'
-search_url = url + 'napi/search/photos?'
+search_url = base_url + 'napi/search/photos?'
 categories = ['images']
 page_size = 20
 paging = True
@@ -25,18 +30,24 @@ paging = True
 
 def clean_url(url):
     parsed = urlparse(url)
-    query = [(k, v) for (k, v) in parse_qsl(parsed.query) if k not in ['ixid', 's']]
+    query = [(k, v) for (k, v)
+             in parse_qsl(parsed.query) if k not in ['ixid', 's']]
 
-    return urlunparse((parsed.scheme,
+    return urlunparse((
+        parsed.scheme,
         parsed.netloc,
         parsed.path,
         parsed.params,
         urlencode(query),
-                       parsed.fragment))
+        parsed.fragment
+    ))
 
 
 def request(query, params):
-    params['url'] = search_url + urlencode({'query': query, 'page': params['pageno'], 'per_page': page_size})
+    params['url'] = search_url + urlencode({
+        'query': query, 'page': params['pageno'], 'per_page': page_size
+    })
+    logger.debug("query_url --> %s", params['url'])
     return params
 
 
@@ -46,10 +57,12 @@ def response(resp):
 
     if 'results' in json_data:
         for result in json_data['results']:
-            results.append({'template': 'images.html',
+            results.append({
+                'template': 'images.html',
                 'url': clean_url(result['links']['html']),
                 'thumbnail_src': clean_url(result['urls']['thumb']),
                 'img_src': clean_url(result['urls']['raw']),
                 'title': result['description'],
-                            'content': ''})
+                'content': ''
+            })
     return results