Codingame Power of Thor 1 with dict and lambda function

moves =\
{
    (0, -1): "N",
    (1, -1): "NE",
    (1, 0): "E",
    (1, 1): "SE",
    (0, 1): "S",
    (-1, 1): "SW",
    (-1, 0): "W",
    (-1, -1): "NW"
}

init_input = input().split()

dist_x = int(init_input[0]) - int(init_input[2])
dist_y = int(init_input[1]) - int(init_input[3])

sign = lambda x: (x > 0) - (x < 0)

while dist_x or dist_y:
    mx, my = sign(dist_x), sign(dist_y)
    print(moves[(mx, my)])
    dist_x -= mx
    dist_y -= my