# 定义列表数据
score_list = [65, 92, 78, 90, 45, 83, 57, 96]												
# 先要定义好字典的键值对
score_dict = {
      'high': [],
      'middle': [],
      'low': []
}
# 循环遍历
for score in score_list:
    # 验证
    if score >=90:
       score_dict['high'].append(score)
    elif score >=60:
       score_dict['middle'].append(score)
    else:
       score_dict['low'].append(score)

# 打印字典
print( score_dict)