Saving & Loading Models (Pickle, joblib)

Summary

Serializing a trained model to a file so it can be loaded and used later without retraining — Pickle is Python's general-purpose serializer, joblib is more efficient for models with large NumPy arrays.

• 1Save a trained model with joblib and reload it in a fresh script.
• 2Learn the security risk of loading pickled files from untrusted sources.
• 3Practice versioning your saved model files with a clear naming convention.