gistfile1.py

    for i in contornos:
        dic = defaultdict(list)
        for punto in i:
            x,y,angulo= gradiente_sobel(punto, imagen)
            dic[angulo].append((x,y))
        listas.append(dic)
    for i in listas:
        print "*************************************"
        for j in i:
            r = int(random.random()*250)
            g = int(random.random()*250)
            b = int(random.random()*250)
            color = (r,g,b)
            print j
            print color
            for k in i[j]:
                print k
                nueva.putpixel((k[0], k[1]), color)
    nueva.save("ss.png")
    f=open("centros.txt","w")