定义:用列表返回可遍历的（键，值）元组数组。 语法：dict.items() 返回值：（键，值）元组数组
dic_score
={"LiGang93":93, "ChenJing78":78, "ZhangJinzhu88":88, "ZhaoQishan91":91, "LiXin65":65, "HuangNing83":83}
print(dic_score
.items())
执行后 遍历字典列表
for key
,values in dic_score
.items():
print
(key
)
