scikit-learn

Name: scikit-learn, abbreviated sklearn (but not “scikit”); “sci” for “science”, “kit” for “toolkit”

References

• Getting Started
• User guide
• Glossary

Examples of using sklearn

• Examples from scikit-learn 1.3.2 documentation

How Trees Work

• Decision Trees
• Understanding Tree Structure

Preprocessing

Unfortunately, even though decision trees do support categorical data in theory, the sklearn implementation does not. You have to one-hot-encode categorical data.

This sklearn example page shows several ways of doing this.