jupyter notebook中import graphviz找不到路径解决办法

安装graphviz

在anaconda powershell Prompt中
输入conda install graphviz
然后安装
conda install -c conda-forge pydotplus

接着在anaconda Prompt中安装
pip install graphviz

参考：https://stackoverflow.com/questions/28312534/graphvizs-executables-are-not-found-python-3-4

import graphviz
import os
os.environ[‘PATH’] = os.environ[‘PATH’]+’;’+os.environ[‘CONDA_PREFIX’]+r"\Library\bin\graphviz"