I am using LightGBM in Azure ML Jupyter notebooks, it works fine and I also installed graphviz.

However this line:

lgb.plot_tree(clf, tree_index = 1, figsize=(20,12))

throws this error:

ExecutableNotFound: failed to execute PosixPath('dot'), make sure the Graphviz executables are on your systems' PATH

CodePudding user response：

Common problem (very common). There are two systems named Graphviz, and you need both! see I'm getting this issue when trying to run the code I found on GitHub. Pydot and graphivz are installed but still getting this error