Question

我正在编写一个程序，我需要根据人物搜索结果从列表中删除产品。以下是我的代码：

 list = [['bike', 50], ['truck', 1000], ['microwave', 10]]
 while True:
    print "----------------------"
    print "Welcome to Craigslist" 
    print "Would you like to:" 
    print "1. Add an item."
    print "2. Find an item."
    print "3. Print the message board."
    print "4. Quit."
    choice = eval(raw_input("Please make a selection."))
    print "-----------------------"

#i took out choice 1 because the problem isn't in choice 1

if choice == 2:
    print "What are you looking for? A bike, microwave, dresser, truck or chicken?"
    itemType = raw_input ("Enter the item type- b, m, d, t, c,:")
    print list
    if itemType == "m":
        itemCost = eval(raw_input("Enter the maximum item cost:"))
        list.remove[('microwave',itemCost)]
        print list
    elif itemType == "d":
        itemCost = eval(raw_input("Enter the maximum item cost:"))
        list.remove('dresser',itemCost)
        print list
    elif itemType == "b":
        itemCost = eval(raw_input("Enter the maximum item cost:"))
        list.remove[('bike' ,itemCost)]
        print list
    elif itemType == "t":
        itemCost = eval(raw_input("Enter the maximum item cost:"))
        list.remove[('truck',itemCost)]
        print list
    elif itemType == "c":
        itemCost = eval(raw_input("Enter the maximum item cost:"))
        list.remove[('chicken',itemCost)]
        print list

if choice == 3:
    print "These are the items for sale on Craigslist."
    print list

if choice == 4:
    quit ("Bye!")

else:
    quit ("Sorry, that's not an option on the menu.")

当我尝试从列表中删除项目时，根据其名称和输入价格，我收到错误：

TypeError: 'builtin_function_or_method' object has no attribute '__getitem__'

当我输入价格时bike我已经尝试完全重写行，切换括号和括号，50和bike等于一个变量然后删除该变量 - 我似乎无法让它工作。我的业余编码大脑的任何输入将不胜感激！ :)

Answer 1

建议：

更改变量名称＆＃39; list＆＃39;类似于＆＃39; list1＆＃39;
删除（（＆＃39;某些＆＃39;，费用））正在寻找删除元组但你有一个列表所以使用：remove（[＆＃39; something＆＃39;，cost]）

3.使用elif而不是多个if语句

4。＆＃39;而True：＆＃39;将一遍又一遍地继续运行缩进块，而不是继续执行if语句。

我认为如果您进行这些更正，代码将执行您希望它执行的操作。希望能帮助到你！

程序不会从列表中删除带变量的项目？

1 个答案: