python - 将引擎从 dot 更改为 neato 时未找到 graphviz PATH 变量

Question

为什么更换引擎时出现错误？点引擎一切正常。

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
从https://graphviz.gitlab.io/_pages/Download/Download_windows.html安装使用 .msi，手动添加到 PATH。
如果您使用的是 jupyter 笔记本，请重新启动 cmd 窗口以及网络浏览器