import random
def str_to_list(arg):
    if arg == '':
        return []
    else:
        return arg.split(',')



# 随机生成唯一颜色
def generate_unique_colors(num_colors):
    generated_colors = set()
    while len(generated_colors) < num_colors:
        color = f"rgb({random.randint(0, 255)}, {random.randint(0, 255)}, {random.randint(0, 255)})"
        generated_colors.add(color)
    return list(generated_colors)