Question

我制作了一个python程序，您可以在其中放置3个最喜欢的汽车，并根据需要添加新的汽车。我两天前开始编程，所以很抱歉如果出现一些小问题。任何帮助，例如添加循环，将不胜感激。谢谢，

print("What are your three favourite cars?")
print("What is your favourite car?")
fav_car = input()
print("What is your 2nd favourite car?")
fav_car2 = input()
print("What is your third favourite car?")
fav_car3 = input()
print("If you want to add another car press a")
a = input()

favourite_cars = [fav_car, fav_car2, fav_car3]
print("Your favourite car is " + favourite_cars[0].title())
print("Your second favourite car is " + favourite_cars[1].title())
print("Your third favourite car is " + favourite_cars[2].title())

if a == "a":
    print("What is your 4th car?")
    next_car = input()
    favourite_cars.append[next_car]
else:
    print("Okay, Have a nice day")

favourite_cars = [fav_car, fav_car2, fav_car3, next_car]
print("Your fourth favourite car is " + favourite_cars[3].title())

Answer 1

您应该使用favorite_cars.append[next_car]而不是favourite_cars.append(next_car)，因为append是一个函数。

另一个较小的更改是，要打印最后一个喜欢的汽车，可以使用favourite_cars[-1].title()。这只是获取数组最后一个元素的Python技巧。

Answer 2

您正在使用带有错误括号的.append函数。试试这个：

print("What are your three favourite cars?")
print("What is your favourite car?")
fav_car = input()
print("What is your 2nd favourite car?")
fav_car2 = input()
print("What is your third favourite car?")
fav_car3 = input()
print("If you want to add another car press a")
a = input()

favourite_cars = [fav_car, fav_car2, fav_car3, next_car]
print("Your favourite car is " + favourite_cars[0].title())
print("Your second favourite car is " + favourite_cars[1].title())
print("Your third favourite car is " + favourite_cars[2].title())

if a == "a":
    print("What is your 4th car?")
    next_car = input()
    favourite_cars.append(next_car)
else:
    print("Okay, Have a nice day")

favourite_cars = [fav_car, fav_car2, fav_car3, next_car]
print("Your fourth favourite car is " + next_car.title())

Answer 3

print("What are your three favourite cars?")
fav_car = input("What is your favourite car?")
fav_car2 = input("What is your 2nd favourite car?")
fav_car3 = input("What is your 3rd favourite car?")
a = input("If you want to add another car press a")

favourite_cars = [fav_car, fav_car2, fav_car3]
print("Your favourite car is " + favourite_cars[0].title())
print("Your second favourite car is " + favourite_cars[1].title())
print("Your third favourite car is " + favourite_cars[2].title())
next_car=0

if a == "a":
    next_car = str(input("What is your 4th car?"))
else:
    print("Okay, Have a nice day")

favourite_cars = [fav_car, fav_car2, fav_car3, next_car]
print("Your fourth favourite car is " + favourite_cars[3].title())

我已经测试了您的代码。我相信问题是您在不需要时添加了favourite_cars。还要清理一下代码（如果要打印问题，只需将问题放入输入中，除非您在问题中使用变量）

尝试运行此程序时，错误始终显示

3 个答案: