update import

MJGao · Jun 2, 2018 · a84cd3c · a84cd3c
1 parent cf7b3c7
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diff --git a/src/py3.x/16.RecommenderSystems/test_evaluation_model.py b/src/py3.x/16.RecommenderSystems/test_evaluation_model.py
@@ -1,3 +1,5 @@
+import math
+import random
 def SplitData(data, M, k, seed):
     test = []
     train = []

diff --git a/src/py3.x/16.RecommenderSystems/test_基于用户.py b/src/py3.x/16.RecommenderSystems/test_基于用户.py
@@ -1,3 +1,5 @@
+import math
+from operator import itemgetter
 def UserSimilarity1(train):
     W = dict()
     for u in train.keys():