How to implement the importance of variable and rule in the RuleFitClassifier algorithm?

[ssqkDrs]

Hello! I've successfully implemented the basic RuleFitClassifier algorithm on the breast cancer dataset following the code examples. However,as a beginner, I'm unsure about how to implement the variable importance analysis demonstrated in the 'Interpretable Machine Learning' book. I would greatly appreciate it if you could provide some guidance on this matter. Thank you in advance!

Furthermore, if this book could provide the complete code examples, I would greatly appreciate it as a loyal reader.

regards