通过使用python获取二维数组中的前两个元素来创建用户菜单

我是python编程新手，我花了3天多的时间试图编写这一部分的代码，真的让我抓狂。如果有人能帮我编码，我将不胜感激

我必须用下面的二维数组创建一个子菜单选择。菜单必须采用以下格式：

苹果MacBookAir

宏碁Aspire SW5-111

华硕记事本7

三星标签S8.4

苹果iphone7

三星Galaxy S8

输入M返回主菜单 否则请输入您的选择

代码

编辑：Python代码：

import sys

product_list = [
    ["Mac Book Air","Apple","Laptop","Equipped with the new fifth-generation Intel Core i5 and i7 processors with Intel HD Graphics.",1350.5],
    ["Aspire SW5-111", "Acer", "Laptop", "Intel® Atom Z3745 processor Quad-core 1.33 GHz CPU.", 510],
    ["MeMo Pad 7", "Asus", "Tablet", "The 7 inch ASUS MeMO Pad 7 was created for those looking for a value tablet.", 620],
    ["Tab S8.4", "Samsung", "Tablet", "You will be surprised by the slim and sleek design of the GALAXY Tab S (8.4\") LTE. It only weighs 298g (LTE) and is easy to carry anywhere.", 788.5],
    ["iPhone 7", "Apple", "Phone", "The iPhone 7 is an exceptional phone in nearly every way.", 900],
    ["Galaxy S8", "Samsung", "Phone", "Newly released!", 1000]
]

# Loop until user says "exit"
while True:
    # Print list of options
    for product_index in range(len(product_list)):
        print("%x: %s %s" % (product_index, product_list[product_index][1], product_list[product_index][0]))

    # Read keyboard input from user
    chosen_index = input("Select option: ")

    # Check if input is a number
    try:
        # It is a number, do whatever you want to do
        chosen_index = int(chosen_index)
        print("Info: %s\n" % product_list[chosen_index][3])
    except ValueError:
        # It's not a number, is the exit command?
        if chosen_index.lower() == "exit":
            print("Exiting..")
            sys.exit()

        # It's not the exit command, give an error message
        print("ERROR: Invalid option. Please provide a number\n")
        continue

python中的

enumerate（）

函数返回一个元组列表，其中包含项索引和列表中的项。i、 e.上面的枚举函数返回：

[(0,["Mac Book Air".....])

…一直到：

(5,["Galaxy s8",...1000])]

---

格式化代码段我尝试运行代码，但遇到一个错误，即原始输入未定义。我可以知道我应该如何定义这个吗？请您也提供代码，以便根据选择列出项目，好吗？例如，如果用户从选项中选择“1”，系统将相应地按名称：、品牌：、类别：、说明：价格列出详细信息（根据产品列表）。您可能正在使用python 3，此代码是用python 2编写的。只需将

raw\u input（）

更改为

input（）

，并将print语句括在括号中，即将它所说的

print“something”

更改为

print（“something”）

。我将把剩余信息的打印留给您去弄清楚，这是一个很好的做法：）@j.koo查看我对python3实现的更新答案。顺便问一下，如果我想从1而不是0启动菜单，我应该如何引用它？只需在打印函数中的

产品索引

中添加1，就像这样：

打印（%x:%s%s）%（product_index+1，product_list[product_index][1]，product_list[product_index][0]）

。请注意，实际索引不会更改，因此用户在想要访问索引0时会键入1，因此您需要从所选索引中减去1:

Selected_index=int（Selected_index）-1

。顺便说一句，如果我的答案能回答你的问题，请接受。

# Python 3

def main_menu():
    listOfProducts = [["Mac Book Air","Apple","Laptop","Equipped with the new fifth-generation Intel Core i5 and i7 processors with Intel HD Graphics.",1350.5],
        ["Aspire SW5-111", "Acer", "Laptop", "Intel® Atom Z3745 processor Quad-core 1.33 GHz CPU.", 510],
        ["MeMo Pad 7", "Asus", "Tablet", "The 7 inch ASUS MeMO Pad 7 was created for those looking for a value tablet.", 620],
        ["Tab S8.4", "Samsung", "Tablet", "You will be surprised by the slim and sleek design of the GALAXY Tab S (8.4\") LTE. It only weighs 298g (LTE) and is easy to carry anywhere.", 788.5],
        ["iPhone 7", "Apple", "Phone", "The iPhone 7 is an exceptional phone in nearly every way.", 900],
        ["Galaxy S8", "Samsung", "Phone", "Newly released!", 1000]]

    nr = 1
    for s in listOfProducts:
        print('%d. %s %s' % (nr, s[1], s[0]))
        nr += 1
    return input('\nEnter M to return to Main Menu Else please enter your selection: ')

print(main_menu())

for i, product in enumerate(listOfProducts):
    print('%s. %s %s' % (i+1, product[1], product[0]))

[(0,["Mac Book Air".....])

(5,["Galaxy s8",...1000])]