When you call the Cython function in your Python code, send the entire NumPy array object as an argument for that function call. Perform all the iteration over the object in Cython .

We will use np.arrays to represent images, and matplotlib to display images. We can do this with no additional packages required. However, two common packages for working with images are imageio and ...

It is possible to use generic Python objects as the dtype for a NumPy array, but if you do this, you’ll get no better performance with NumPy than you would with Python generally.

This post shows you how to use arrays in Python and why this data structure is so useful. A foundational skill for data science, coding, ... Also read: How to use lists in Python.