How many categories were present in the 'ocean proximity' column after applying one-hot encoding to the…

How many categories were present in the 'ocean proximity' column after applying one-hot encoding to the…: a task in SmolDataEnvs-harbor-train-sandbox: 📊 SmolDataEnvs: Harbor (train) (Harbor dataset). Files (in /home/user/input, no subfolders): - housing.csv