normalize

def normalize(points, height=10):
    new_points = []
    mini = min(points)
    for point in points:
        new_points.append(point-mini)
    newer_points = []
    maxi = max(new_points)
    for point in new_points:
        newer_points.append(point*height/maxi)
    return newer_points

points=[-2,0,1]

print normalize(points)