In the past, we have covered Decision Trees showing how interpretable these models can be (see the tutorials here). In the previous tutorials, we exported the rules of the models using the function export_graphviz from sklearn and visualized the output of this function in a graphical way with an external tool which is not easy to install in some cases. Luckily, since version 0.21.2, scikit-learn offers the possibility to export Decision Trees in a textual format (I implemented this feature personally!) and in this post we will see an example how of to use this new feature.
Let's train a tree with two layers on the famous iris dataset using all the data and print the resulting rules using the brand new function export_text: