scikit-learn
scikit-learn is the magical black box library lurking in the Python woods. It promises easy access to a plethora of algorithms, yet conceals a carnival of C and Fortran labyrinths in its internals. It masquerades as a savior for novices but has mastered the art of drowning them in a sea of hyperparameters. Its documentation appears comprehensive, yet its tuning guidance often reads like abstract incantations. While inviting you on a grand machine learning adventure, it guarantees an endless ordeal of production troubleshooting, a bittersweet temptation indeed.