Machine Learning

Short answers about Machine Learning. One topic, one working example, no fluff.

• Machine LearningCross-validation in scikit-learn explainedLearn how sklearn cross_val_score runs 5-fold cross-validation and why a single train/test split can give a misleading score.November 2, 2026 · 2 min read
• Machine Learningscikit-learn train_test_split and your first modelLearn how to split data with train_test_split, fit a KNeighborsClassifier, score it on test data and compare it with a baseline.October 29, 2026 · 2 min read