Using NumPy for array and matrix math in Python. Many mathematical operations, especially in machine learning or data science, involve working with matrixes, or lists of numbers.

To create an array in Python, we can use a type of variable called a “dictionary.” This is an associative array, meaning that it is made of value/key pairs. This looks like so: ...

If you are doing matrix-based or array-based math and you don’t want the Python interpreter getting in the way, use NumPy. By drawing on C libraries for the heavy lifting, NumPy offers faster ...