def use_standard_user_rating(self, item_list=[]): """没有评分暂时用None表示，与0区别""" all_user = self.get_all_users() if item_list==[]: item_list = self.get_all_items() self.user_rating_std = True for x in item_list: input_list = [] for u in all_user: if self.user_rating[u].has_key(x): input_list.append(self.user_rating[u][x]) else: input_list.append(None) normal_value = convert_values_normalization(input_list) # update value for i in len(normal_value): self.user_rating[all_user[i]][x] = normal_value[i] or None
def use_standard_user_rating(self, item_list=[]):
"""
在标准化的data里，0和没有评分很难区分。
没有评分暂时用None表示
"""
# get standard value
all_user = self.get_all_users()
for x in item_list:
input_list = []
for u in all_user:
if not self.user_rating[u].has_key(x):
input_list.append(None)
else:
input_list.append(self.user_rating[u][x])
normal_value = convert_values_normalization(input_list)
# update value
for i in len(normal_value):
if normal_value[i] != None:
self.user_rating[all_user[i]][x] = normal_value[i]
print "Use standard user rating."