Problem Description
InvocationException: GraphViz's executables not found solutions
problem solved
Path path GraphViz installation directory bin directory into the environment variables
under windows:
import os
os.environ["PATH"] += os.pathsep + 'C:/Program Files (x86)/Graphviz2.38/bin/' #注意修改你的路径
reference
InvocationException: GraphViz's executables not found solutions
Python decision tree visualization: GraphViz's executables not found solution