#把决策树结构写入dot文件with open(" tree. dot”，'w ) as f:f = tree. export. _graphviz(c1f, out_ file=f)#保存决策树结构图为pdf文件dot_ data = tree. export_ _grappviz(c1f， out_ file=None)graph = pydotplus. graph_ from dot. data (dot_ data)graph. write. pdf(" tree. pdf" )#数据可视化Image (graph. create_ png())#决策树可视化也可以使用plot_tree()
