安装graphviz

pip install graphviz

从 http://www.graphviz.org/下载

   graphviz-2.38.msi

添加安装文件bin目录到环境变量

重启pycharm

from graphviz import Digraph

g = Digraph('测试图片')
g.node(name='a',color='red')
g.node(name='b',color='blue')
g.edge('a','b',color='green')
g.view()