pydot.InvocationException: GraphViz's executables not found

Question

I try to run this example for decision tree learning, but get the following error message:

File \"coco.py\", line 18, in graph.write_pdf(\"iris.pdf

Answer 1

On mac, use Brew to install graphviz and not pip, see links:

graphviz information: http://www.graphviz.org/download/

brew installation: https://brew.sh/

So typing the following in the terminal after you install brew should work:

brew install graphviz