将引擎从点更改为n时找不到graphviz路径变量

Question

为什么我在更换发动机时出错？点引擎一切正常。你知道吗

代码：

from graphviz import Graph

dot = Graph()
dot.engine = 'neato'

dot.node('a')
dot.node('b')

dot.edge('a', 'b')

print(dot.source)
dot.render('test-output/round-table.gv', view=True)

错误：

graphviz.backend.ExecutableNotFound: failed to execute 
['neato', '-Tpdf', '-O', 'test-output/round-table.gv'], 
make sure the Graphviz executables are on your systems' PATH

Answer 1

这帮助我解决了windows上的问题：
"RuntimeError: Make sure the Graphviz executables are on your system's path" after installing Graphviz 2.38
使用.msi从https://graphviz.gitlab.io/_pages/Download/Download_windows.html安装，手动添加到路径。
如果您使用的是jupyter笔记本，请重新启动cmd窗口，可能还有web浏览器