DouKaku?

data = {
    1: [2, 3, 4, 5, 7],
    2: [1],
    3: [1, 2],
    4: [2, 3, 5],
    5: [1, 3, 4, 6],
    6: [1, 5],
    7: [5],
}

m = [[1.0 / len(data[j]) if i in data[j] else 0
      for j in range(1, 8)]
      for i in range(1, 8)]

from numpy import array
from numpy.linalg import eig

(v, d) = eig(array(m))

max_v = list(v).index(max(v))
pagerank = [abs(row[max_v]) for row in d]
k = sum(pagerank)
pagerank = [x / k for x in pagerank]

print pagerank