协同过滤算法，用python检验，可用于推荐系统中的协同过滤推荐算法，进而进行计算模拟G代码和M代码说明代温湿度实时监视报警，语音报警(Collaborative filtering algorithm, using Python test, can be applied to collaborative filtering recommendation algorithm in recommender system, and then calculate, simulate G code an