def recommend(filepath):
'''
为所有用户进行推荐，并保存计算结果
-------------------------------
filepath: 保存推荐结果的文件路径
-------------------------------
return: {uid:[entryid,...],...}
'''
predictions = {}
dbhelper = DBHelper()
uids = dbhelper.get_uids()
recommender = LogitRegRecommender()
for uid in uids:
print 'predict', uid
result = recommender.recommend(uid)
predictions[uid] = result
evaluator = Evaluator()
precision,recall,F1 = evaluator.evaluate(predictions, filepath)
print precision,recall,F1
