vis.py 文件源码

def get_cmap(N):
    '''Returns a function that maps each index in 0, 1, ... N-1 to a distinct RGB color.'''
    color_norm  = colors.Normalize(vmin=0, vmax=N-1)
    scalar_map = cmx.ScalarMappable(norm=color_norm, cmap='hsv') 
    def map_index_to_rgb_color(index):
        return scalar_map.to_rgba(index)
    return map_index_to_rgb_color