Merge branch 'similar_sort' into 'master'

modify

See merge request alpha/physical!161

linucb/views/collect_data.py

@@ -127,7 +127,7 @@ class CollectData(object):
                             exposure_topic_id = item["card_id"]
                             logging.info(
                                 "consume exposure topic_id:%s,device_id:%s" % (str(exposure_topic_id), str(device_id)))
-                            exposure_topic_id_list.extend(exposure_topic_id)
+                            exposure_topic_id_list.append(exposure_topic_id)
 
                         topic_tag_id_dict = dict()
                         tag_list = list()