python - 我正在尝试制作一个输出您的信用评分的应用程序

Question

我正在尝试制作一个程序，告诉您如果房子值(value) 100 万美元，您的首付将是多少。

如果用户输入的数字不是 350 - 850 或输入非整数，那么它会要求用户输入有效的信用评分，并循环直到用户这样做。然后它会告诉用户他们需要支付多少钱。

我一整天都在为此苦苦挣扎，不知道自己做错了什么。如果有人可以帮忙吗？

good_credit = range(750, 851)
bad_credit = range(350, 750)
valid_credit_score = range(350, 851)

print("A house is $1,000,000")
question = ("What is your credit score? ")
answer = input(f"{question} ")

for answer in valid_credit_score:
    credit_score = True
else:
    credit_score = False

while credit_score == False:
    print("Please input a valid credit score.")
    answer = input(f"{question} ")
    if answer == range(350, 851):
        credit_score = True
        break
    break

while credit_score == True:
    if answer == good_credit:
        print("Your down payment will be $100,000.")
        break
    elif answer == bad_credit:
        print("Your down payment will be $200,000.")
        break

无论我输入什么整数，由于某种原因，它总是使credit_score变量为假。

Answer 1

这里发生了一些事情:

1. 您正在将一个值与一个范围进行比较，例如，10 == range(0,20) 将始终返回 False。

2. 您正在将字符串与整数进行比较。如果您检查类型，您会发现 answer 实际上是 str。

type(answer)

Out[1]:
str

因此你应该尝试:

1. 将 if int(answer) == good_credit 替换为 if int(answer) in good_credit
2. 将中的answer ==替换为int(answer)



good_credit = range(750, 851)
bad_credit = range(350, 750)
valid_credit_score = range(350, 851)

print("A house is $1,000,000")
question = ("What is your credit score? ")
answer = input(f"{question} ")

if int(answer) in valid_credit_score:
    credit_score = True
else:
    credit_score = False

while credit_score == False:
    print("Please input a valid credit score.")
    answer = input(f"{question} ")
    if int(answer) in range(350, 851):
        credit_score = True
        break
    break

while credit_score == True:
    if int(answer) in good_credit:
        print("Your down payment will be $100,000.")
        break
    elif int(answer) in bad_credit:
        print("Your down payment will be $200,000.")
        break