graphviz Windows中文乱码

1.第一步：

C:\Program Files (x86)\Graphviz2.37\etc\fonts    fonts.conf

C:/WINDOWS/Fonts
 ~/.fonts

2.第二步，在保存时保存为utf-8或者手动utf-8格式：

with open("D:\\id3.dot","w",-1,"utf-8") as f:

3.第三步：在保存文件前面修改如下：

edge [fontname="Microsoft YaHei"];

node [shape=box, fontname="Microsoft YaHei" size="20,20"];