pageranktest.py

ranks = [1,1,1,1]
links = [[1], [0], [0,3], [2]]
damping = 1

iterations = 100

for _ in range(0, iterations):
    contributions = [0,0,0,0]
    for i, page_links in enumerate(links):
        for link in page_links:
            contributions[link] += ranks[i] / len(page_links)
    ranks = [(1 - damping) / len(ranks) + damping * c for c in contributions]

print ('Page ranks after %d iterations: %s' % (iterations, ranks))