参考：
https://www.cnblogs.com/zhanjiahui/p/11335038.html
https://blog.csdn.net/linxid/article/details/79386223

Anaconda安装Graphviz

1、打开Anaconda终端，openterminal
2、终端输入：
conda install graphviz
pip install graphviz

打开jupyter:

jupyter lab

引入graphviz:

import graphviz

报错处理

加上out_file=None

import graphviz
dot_data = tree.export_graphviz(clf
                               ,feature_names = feature_name
                               ,class_names=["琴酒","雪莉","贝尔摩德"]
                               ,filled=True
                               ,rounded=True
                               ,out_file=None
                               )
graph = graphviz.Source(dot_data)
graph

jupyter中使用graphviz

原文：https://www.cnblogs.com/flypig666/p/11986856.html