add comments to google-engines

searx/engines/google.py

-#!/usr/bin/env python
+## Google (Web)
+# 
+# @website     https://www.google.com
+# @provide-api yes (https://developers.google.com/web-search/docs/), deprecated!
+# 
+# @using-api   yes
+# @results     JSON
+# @stable      yes (but deprecated)
+# @parse       url, title, content
 
 from urllib import urlencode
 from json import loads
 
+# engine dependent config
 categories = ['general']
+paging = True
+language_support = True
 
+# search-url
 url = 'https://ajax.googleapis.com/'
 search_url = url + 'ajax/services/search/web?v=2.0&start={offset}&rsz=large&safe=off&filter=off&{query}&hl={language}'  # noqa
 
-paging = True
-language_support = True
-
 
+# do search-request
 def request(query, params):
     offset = (params['pageno'] - 1) * 8
+
     language = 'en-US'
     if params['language'] != 'all':
         language = params['language'].replace('_', '-')
+
     params['url'] = search_url.format(offset=offset,
                                       query=urlencode({'q': query}),
                                       language=language)
+
     return params
 
 
+# get response from search-request
 def response(resp):
     results = []
+
     search_res = loads(resp.text)
 
+    # return empty array if there are no results
     if not search_res.get('responseData', {}).get('results'):
         return []
 
+    # parse results
     for result in search_res['responseData']['results']:
+        # append result
         results.append({'url': result['unescapedUrl'],
                         'title': result['titleNoFormatting'],
                         'content': result['content']})
+
+    # return results
     return results

searx/engines/google_images.py

-#!/usr/bin/env python
+## Google (Images)
+# 
+# @website     https://www.google.com
+# @provide-api yes (https://developers.google.com/web-search/docs/), deprecated!
+# 
+# @using-api   yes
+# @results     JSON
+# @stable      yes (but deprecated)
+# @parse       url, title, img_src
 
 from urllib import urlencode
 from json import loads
 
+# engine dependent config
 categories = ['images']
+paging = True
 
+# search-url
 url = 'https://ajax.googleapis.com/'
 search_url = url + 'ajax/services/search/images?v=1.0&start={offset}&rsz=large&safe=off&filter=off&{query}'  # noqa
 
-paging = True
 
+# do search-request
 def request(query, params):
     offset = (params['pageno'] - 1) * 8
+
     params['url'] = search_url.format(query=urlencode({'q': query}),
                                       offset=offset)
+
     return params
 
 
+# get response from search-request
 def response(resp):
     results = []
+
     search_res = loads(resp.text)
-    if not search_res.get('responseData'):
-        return []
-    if not search_res['responseData'].get('results'):
+
+    # return empty array if there are no results
+    if not search_res.get('responseData', {}).get('results'):
         return []
+
+    # parse results
     for result in search_res['responseData']['results']:
         href = result['originalContextUrl']
         title = result['title']
         if not result['url']:
             continue
+
+        # append result
         results.append({'url': href,
                         'title': title,
                         'content': '',
                         'img_src': result['url'],
                         'template': 'images.html'})
+
+    # return results
     return results

searx/engines/google_news.py

-#!/usr/bin/env python
+## Google (News)
+# 
+# @website     https://www.google.com
+# @provide-api yes (https://developers.google.com/web-search/docs/), deprecated!
+# 
+# @using-api   yes
+# @results     JSON
+# @stable      yes (but deprecated)
+# @parse       url, title, content, publishedDate
 
 from urllib import urlencode
 from json import loads
 from dateutil import parser
 
+# search-url
 categories = ['news']
+paging = True
+language_support = True
 
+# engine dependent config
 url = 'https://ajax.googleapis.com/'
 search_url = url + 'ajax/services/search/news?v=2.0&start={offset}&rsz=large&safe=off&filter=off&{query}&hl={language}'  # noqa
 
-paging = True
-language_support = True
-
 
+# do search-request
 def request(query, params):
     offset = (params['pageno'] - 1) * 8
+
     language = 'en-US'
     if params['language'] != 'all':
         language = params['language'].replace('_', '-')
+
     params['url'] = search_url.format(offset=offset,
                                       query=urlencode({'q': query}),
                                       language=language)
+
     return params
 
 
+# get response from search-request
 def response(resp):
     results = []
+
     search_res = loads(resp.text)
 
+    # return empty array if there are no results
     if not search_res.get('responseData', {}).get('results'):
         return []
 
+    # parse results
     for result in search_res['responseData']['results']:
-
-# Mon, 10 Mar 2014 16:26:15 -0700
+        # parse publishedDate
         publishedDate = parser.parse(result['publishedDate'])
 
+        # append result
         results.append({'url': result['unescapedUrl'],
                         'title': result['titleNoFormatting'],
                         'publishedDate': publishedDate,
                         'content': result['content']})
+
+    # return results
     return results