seminar4.py

def persen(mass1, mass2):
    avg_mass1 = sum(mass1)/len(mass1)
    avg_mass2 = sum(mass2)/len(mass2)

    a1 = [x - avg_mass1 for x in mass1]
    a2 = [x - avg_mass2 for x in mass2]

    psum = sum(xi * yi for xi, yi in zip(a1, a2))

    aa1 = [pow(x - avg_mass1, 2) for x in mass1]
    aa2 = [pow(x - avg_mass2, 2) for x in mass2]

    psqsum = pow(sum(xi * yi for xi, yi in zip(aa1, aa2)), 0.5)

    return psum/psqsum


print(persen([1, 2, 3], [4, 5, 6]))