TypeError：列表标记必须是整数或切片，而不是str

Question

我对编码有点陌生，因为我在学校没有得到适当的教育，所以我尝试在校外学习。这是我的菜单代码

Sauces = ("\nSauces: \n Cranberry Sauce \n Barbecue Sauce \n Brown Sauce \n Horseradish \n Hot Sauce \n Mayonnaise \n Mustard \n Ketchup \n No Sauce")
Starters = ("\nStarters: \n Calamary \n Chilli Prawn Bruschetta \n Chicken Satay \n 5 Chicken Drumsticks \n Smoked Salmon Cocktial \n Backed Mushrooms With Festive Cheese \n Soup Served In Bread \n Arancini \n Garlic Bread")

while True:
    try:
        NumberPeople = int(input("How many people are here today? "))
    except ValueError:
        print("Sorry I didn't understand that. Please try again.")
        continue

    if NumberPeople < 0:
        print("Sorry, you cannot have negative amount of people.")
        continue

    if NumberPeople < 1:
        print("Sorry, you cannot have nobody coming.")
        continue
    
    else:
        break

if NumberPeople < 3:
    print("Thank you. There is a table free for you at Table 2")
elif NumberPeople < 5:
    print("Thank you. There is a table free for you at Table 1")
elif NumberPeople < 7:
    print("Thank you. There is a table free for you at Table 3")
elif NumberPeople < 21:
    print("Thank you. There is a table free for you at Table 8")
else:
    print("Sorry we don't have enough space for that many people")




print(Starters)
MyOrder = []
for i in range(NumberPeople):
    while True:
        try:
            StarterMenu = input ("\nPerson %i, what would you like? " % (i + 1))
        except ValueError:
            print("Sorry I didn't understand. Please try again.")
            continue
        if StarterMenu == "Calamary":
            print(Sauces)
            SauceChoice = input("\nWhat sauce do you want? ")
            if SauceChoice == "Cranberry Sauce":
                MyOrder.append("Calamary with Cranberry Sauce")
                break
            elif SauceChoice == "Barbecue Sauce":
                MyOrder.append("Calamary with Barbecue Sauce")
                break
            elif SauceChoice == "Brown Sauce":
                MyOrder.append("Calamary with Brown Sauce")
                break
            elif SauceChoice == "Horseradish":
                MyOrder.append("Calamary with Horseradish")
                break
            elif SauceChoice == "Hot Sauce":
                MyOrder.append("Calamary with Hot Sauce")
                break
            elif SauceChoice == "Mayonnaise":
                MyOrder.append("Calamary with Mayonnaise")
                break
            elif SauceChoice == "Mustard":
                MyOrder.append("Calamary with Mustard")
                break
            elif SauceChoice == "Ketchup":
                MyOrder.append("Calamary with Ketchup")
                break
            elif SauceChoice == "No Sauce":
                MyOrder.append("Calamary with No Sauce")
                break
            else:
                print("Sorry I didn't understand. Please try again")
                continue
        else:
            print("Okay No Starter")

上面的所有内容似乎都运行顺利，但下面的代码遇到了我似乎不理解的问题。我查看了这个网站，发现我应该这样做，但当我这样做时，我得到了类型错误：列表标记必须是整数或切片，而不是str.

    print ("Order is being processed, next order:\n")
    MyOrder.append({ 'SauceChoice': SauceChoice })

print('The orders has been processed with these data:')
for i in range(NumberPeople):
    order = MyOrder[i]
    print (' - Person', i + 1, 'wants ', StarterMenu, 'with %i ' % MyOrder['SauceChoice'])

Answer 1

你的问题是：

MyOrder['SauceChoice']

您正在使用字符串作为索引，而不是整数变量SauceChoice。字符串不是列表/元组的合法索引

Answer 2

print (' - Person', i + 1, 'wants ', StarterMenu, 'with %i ' % MyOrder['SauceChoice'])

MyOrder定义为一个列表。当您试图访问SauceChoice的值时，必须指定键“SauceChoice”的索引