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. The naive way to ...

How to use arrays in Python 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.

Any functions that accept a NumPy array as an argument should be properly typed, so that Cython knows how to interpret the argument as a NumPy array (fast) rather than a generic Python object (slow).