NumPy Arrays: Why Not Just Use a Python List?

You have been using NumPy arrays since post 17. np.array([1, 2, 3]) . np.zeros((3, 4)) . np.random.randn(100) . You have typed these dozens of times without stopping to ask why. Why not just use a Python list? Lists hold numbers. Lists can be looped over. Lists support indexing. What does NumPy actually add? The answer matters more than you might think. When you understand why NumPy arrays are different, you stop fighting the library and start using it the way it was designed to be used. The Spe