Windows10
pip install pydot-ng
pip install graphviz
pip install pydot
https://www.softpedia.com/get/Others/Miscellaneous/Graphviz.shtml#download
在系统环境变量【Path】中添加变量【F:\Program Files (x86)\Graphviz2.38\bin】即可
Linux
sudo apt install python-pydot python-pydot-ng graphviz
sudo yum install python-pydot python-pydot-ng graphviz
原文：https://www.cnblogs.com/dyc99/p/12987085.html