build_anti_testset() 耗时较长,最后却无法运行

1- reader = Reader(rating_scale=(1, 5)) 2- data = Dataset.load_from_df(ratings[['userId', 'asin', 'rating']], reader) # 这是我的自定义数据集 3- svd = SVD(n_factors=30, n_epochs=20, lr_all=0.005, reg_all=0.02) 4- real_trainset = data.build_full_trainset() 5- svd.fit(real_trainset) 6- real_testset = real_trainset.build_anti_testset() # 程序在执行一段时间后停止在第6行,最后返回内存错误