[fix] flickr engine code cleanup ++ handle missing owner

searx/engines/flickr-noapi.py

@@ -1,6 +1,6 @@
 #!/usr/bin/env python
 
-## Flickr (Images)
+#  Flickr (Images)
 #
 # @website     https://www.flickr.com
 # @provide-api yes (https://secure.flickr.com/services/api/flickr.photos.search.html)
@@ -12,8 +12,6 @@
 
 from urllib import urlencode
 from json import loads
-from urlparse import urljoin
-from lxml import html
 import re
 
 categories = ['images']
@@ -22,9 +20,11 @@ url = 'https://secure.flickr.com/'
 search_url = url+'search/?{query}&page={page}'
 photo_url = 'https://www.flickr.com/photos/{userid}/{photoid}'
 regex = re.compile(r"\"search-photos-models\",\"photos\":(.*}),\"totalItems\":", re.DOTALL)
+image_sizes = ('o', 'k', 'h', 'b', 'c', 'z', 'n', 'm', 't', 'q', 's')
 
 paging = True
 
+
 def build_flickr_url(user_id, photo_id):
     return photo_url.format(userid=user_id, photoid=photo_id)
 
@@ -40,13 +40,13 @@ def response(resp):
 
     matches = regex.search(resp.text)
 
-    if matches == None:
+    if matches is None:
         return results
 
     match = matches.group(1)
     search_results = loads(match)
 
-    if not '_data' in search_results:
+    if '_data' not in search_results:
         return []
 
     photos = search_results['_data']
@@ -54,33 +54,20 @@ def response(resp):
     for photo in photos:
 
         # In paged configuration, the first pages' photos are represented by a None object
-        if photo == None:
+        if photo is None:
             continue
 
+        img_src = None
         # From the biggest to the lowest format
-        if 'o' in photo['sizes']:
-            img_src = photo['sizes']['o']['displayUrl']
-        elif 'k' in photo['sizes']:
-            img_src = photo['sizes']['k']['displayUrl']
-        elif 'h' in photo['sizes']:
-            img_src = photo['sizes']['h']['displayUrl']
-        elif 'b' in photo['sizes']:
-            img_src = photo['sizes']['b']['displayUrl']
-        elif 'c' in photo['sizes']:
-            img_src = photo['sizes']['c']['displayUrl']
-        elif 'z' in photo['sizes']:
-            img_src = photo['sizes']['z']['displayUrl']
-        elif 'n' in photo['sizes']:
-            img_src = photo['sizes']['n']['displayUrl']
-        elif 'm' in photo['sizes']:
-            img_src = photo['sizes']['m']['displayUrl']
-        elif 't' in photo['sizes']:
-            img_src = photo['sizes']['to']['displayUrl']
-        elif 'q' in photo['sizes']:
-            img_src = photo['sizes']['q']['displayUrl']
-        elif 's' in photo['sizes']:
-            img_src = photo['sizes']['s']['displayUrl']
-        else:
+        for image_size in image_sizes:
+            if image_size in photo['sizes']:
+                img_src = photo['sizes'][image_size]['displayUrl']
+                break
+
+        if not img_src:
+            continue
+
+        if 'id' not in photo['owner']:
             continue
 
         url = build_flickr_url(photo['owner']['id'], photo['id'])