错误消息“int() 参数”和“NoneType”

Question

我想知道您是否可以再次帮助我。 仍然在入门级挣扎..

这一次，我冒险看看我是否可以编写一个简单的贷款模拟器，就像你看到的那样，找出你可以获得的最大抵押贷款金额。

我写了这个（不知道它是否运行到最后，并且可能写得不好），但它告诉我我在问题 5 中写错了一些东西，并告诉我一些关于“NoneType”的信息。 我有点理解“NoneType”是什么，但我不明白哪里错了。

我也不明白为什么它没有在之前的第三季度和第四季度向我抛出这个问题。

如果有人可以提供帮助，非常感谢！

Z

---

#lc is total lending capacity v is income w is years left x is asset y is dependents z is healthrisk

def lc(v, w, x=0, y=1, z=1):
    """returns the maximum amount the bank can extend to you as a loan."""
    return (v*w+x)*y*z

q1 = input("Enter your monthly income in 1 man-yen units")
v = 12*0.8*int(q1)

q2 = input("Enter the years you have left at your workplace")
w = int(q2)

q3 = input("Do you have any assets? If you do, write that amount in man-yen units. If none write 'n'")
try:
    x = int(q3)
except(ValueError):
    print("Okay, it is understood that you have no assets.")

q4 = input("If you dependants, write that number as an interger. If none write 'n'")
try:
    q4 = int(q4)
    a4 = 1-0.1*q4
except(ValueError):
    print("Okay, it is understood that you have no dependants.")

q5 = print("Write the number of times you went to hospital last year. If you havent been at all write 'n'")
try:
    q5 = int(q5)
    a5 = 1-0.1*q5
except(ValueError):
    print("Okay, it is understood that you did not go to the hospital at all last year.")

lc
print(lc)

-- 但我明白了……

Traceback (most recent call last):
 q5 = int(q5)
TypeError: int() argument must be a string, a bytes-like object or a number, not 'NoneType'

---

Answer 1

你所做的只是犯了一个愚蠢的错误。在定义q5 时，您必须使用input 而不是print。这是解决方法

q5 = input("Write the number of times you went to hospital last year. If you havent been at all write 'n'")
if q5.is_digit():
  q5 = int(Q5)
  a5 = 1 - (0.1 * Q5)
else:
  print("Okay, it is understood that you did not go to the hospital at all last year")

我对您的代码进行了一些更改，以便更快！欢迎您

Answer 2

这是你的代码：

def lc(v, w, x=0, y=1, z=1):
    """returns the maximum amount the bank can extend to you as a loan."""
    return (v*w+x)*y*z

q1 = input("Enter your monthly income in 1 man-yen units")
v = 12*0.8*int(q1)

q2 = input("Enter the years you have left at your workplace")
w = int(q2)

q3 = input("Do you have any assets? If you do, write that amount in man-yen units. If none write 'n'")
try:
    x = int(q3)
except(ValueError):
    print("Okay, it is understood that you have no assets.")

q4 = input("If you dependants, write that number as an interger. If none write 'n'")
try:
    q4 = int(q4)
    a4 = 1-0.1*q4
except(ValueError):
    print("Okay, it is understood that you have no dependants.")

q5 = input("Write the number of times you went to hospital last year. If you havent been at all write 'n'")
try:
    q5 = int(q5)
    a5 = 1-0.1*q5
except(ValueError):
    print("Okay, it is understood that you did not go to the hospital at all last year.")

lc
print(lc)

I did not get what you want to do in the last two lines do you want to call the function lc?