wine的数据来源是UCI数据库，记录的是在意大利同一区域里三种不同品种的葡萄酒的化学成分分析，数据里含有178个样本，每个样本含有13个特征向量（化学成分），每个样本的类别标签已给，该程序主要实现意大利葡萄酒种类识别。(The data source for wine is the UCI database, which records the chemical composition of three different varieties of wines in the same area of Italy. The data contains 178 samples, each containing 13 eigenvectors (chemical components), and each sample Category label has been given, the program mainly to achieve the recognition of the Italian wine type.)