葡萄多少钱一斤？

胡歌老师这两天去监考了
98上看到一个python
凭借我3天的学习经验。。做出了一步。。

题目：
给定4种水果，分别是苹果、梨、橘子、葡萄，
单价分别是3.0 元/公斤，2.5 元/公斤，4.1元/公斤，10.2元/公斤

1. 首先在屏幕上显示以下菜单：
   [1]apple [2]pear [3] orange [4]grape
2. 用户输入1-4查询对应水果的单价
3. 连续查询超过5次，程序退出查询
4. 输入不超过5次，但输入0时，程序退出查询
5. 输入其他编号，显示0

fruits=["[1]apple"," [2]pear"," [3] orange"," [4]grape "]
print(' '.join(fruits)) #去掉外侧方括号
print("\r") #换行
price=["3","2.5","4.1","10.2"]
number=int( input("the number of fruits"))
if number==0:
    exit
elif 1<=number<=len(fruits):
    print(fruits[number-1]+":"+price[number-1]+"r/kg")
else:
    print(0)

实现了1、2、4、5
3？↓ 加while 计次

fruits=["[1]apple"," [2]pear"," [3] orange"," [4]grape "]
print(' '.join(fruits))
price=["3","2.5","4.1","10.2"]
a=0
while a<5:
    number=int( input("the number of fruits: "))
    if number==0:
        break
    elif 1<=number<=len(fruits):
        print(fruits[number-1]+":"+price[number-1]+"r/kg")
    else:
        print(0)
    a=a+1 #这一行要在while里面！

运行结果

[1]apple  [2]pear  [3] orange  [4]grape 
the number of fruits: 1
[1]apple:3r/kg
the number of fruits: 2
 [2]pear:2.5r/kg
the number of fruits: 3
 [3] orange:4.1r/kg
the number of fruits: 4
 [4]grape :10.2r/kg
the number of fruits: 5
0
>>> 

[1]apple  [2]pear  [3] orange  [4]grape 
the number of fruits: 0
>>>