scikit-optimize (skopt)

Scikit-Optimize, often referred to as skopt, is a simple and efficient Python library for sequential model-based optimization. It's designed to minimize expensive and noisy black-box functions, building on top of NumPy, SciPy, and Scikit-Learn. Version 0.10.2 is the current release. The library is under active development, with releases occurring periodically, making it a robust tool for tasks like hyperparameter tuning in machine learning.