上信考python二三级程序填空

Question

字典cart为某餐饮外卖平台用户的购买菜品信息。程序功能为统计各菜品的销售数量
情况，并将其购买次数降序输出（由于字典的无序特性，对购买次数相同的菜品输出先
后允许变化）。

cart={"1101":["水煮鱼","毛血旺"],
 "1102":["麻婆豆腐","清炒虾仁","水煮鱼"],
 "1103":["锅包肉","炒青菜"],
 "1104":["口水鸡","炒青菜"],
 "1105":["炒青菜","锅包肉","水煮鱼"],
 "1106":["麻婆豆腐","锅包肉","炒青菜"]}
sta={}
for key,values in (1) :
 for i in values:
 sta[i]= (2) +1
sta_list=list(sta.items())
sta_list.sort(key= (3) x:x[1],reverse=True)
for item in sta_list:
 print("{}被购买{}次".format( (4) ,item[1]))
![img](https://img-mid.csdnimg.cn/release/static/image/mid/ask/467182993696124.png "#left")

Answer 1

cart
sta[i]
lambda
item[0]