Merge branch 'linUCB' into 'master'

modify

See merge request !130

linucb/views/linucb.py

@@ -8,6 +8,7 @@ from trans2es.models.tag import Tag
 import logging
 import traceback
 import json
+import pickle
 
 class LinUCB:
     d = 2
@@ -45,7 +46,7 @@ class LinUCB:
             theta_list = list()
 
             for tag_id in redis_linucb_tag_data_dict:
-                tag_dict = json.loads(redis_linucb_tag_data_dict[tag_id])
+                tag_dict = pickle.loads(redis_linucb_tag_data_dict[tag_id])
                 Aa_list.append(tag_dict["Aa"])
                 theta_list.append(tag_dict["theta"])
 
@@ -78,8 +79,8 @@ class LinUCB:
                     "ba": np.zeros((cls.d, 1)),
                     "AaI": np.identity(cls.d)
                 }
-                json_data = json.dumps(init_dict)
-                user_tag_linucb_dict[tag_id] = json_data
+                pickle_data = pickle.dumps(init_dict)
+                user_tag_linucb_dict[tag_id] = pickle_data
 
             redis_cli.hmset(redis_key, user_tag_linucb_dict)
 
@@ -108,7 +109,7 @@ class LinUCB:
                 if not ori_redis_tag_data:
                     LinUCB.init_device_id_linucb_info(redis_client, redis_prefix, device_id,[tag_id])
                 else:
-                    ori_redis_tag_dict = json.loads(ori_redis_tag_data)
+                    ori_redis_tag_dict = pickle.loads(ori_redis_tag_data)
                     new_Aa_matrix = ori_redis_tag_dict["Aa"] + np.dot(xa, xaT)
                     new_AaI_matrix = np.linalg.solve(new_Aa_matrix, np.identity(cls.d))
                     new_ba_matrix = ori_redis_tag_dict["ba"] + r*xa
@@ -120,7 +121,7 @@ class LinUCB:
                         "theta": np.dot(new_AaI_matrix, new_ba_matrix)
                     }
 
-                    redis_cli.hset(redis_key, tag_id, json.dumps(user_tag_dict))
+                    redis_cli.hset(redis_key, tag_id, pickle.dumps(user_tag_dict))
             return True
         except:
             logging.error("catch exception,err_msg:%s" % traceback.format_exc())