为什么 TextError 异常在此代码中无法正常运行？

Question

当用户输入零时，输出“不要被零除，这是禁止的”下面的代码很好，但是如果输入了一个句子或字符，它 returns 一个 ValueError。错误如下：

Traceback (most recent call last):
  File "exceptions.py", line 5, in <module>
    num2 = int(input())
ValueError: invalid literal for int() with base 10: 'Hello World'

代码来自 PicoCTF 的教程部分，可以在下面找到：

我试过改变： except TypeError: print("Your input value must be an integer.")

到

except Value Error: print("Your input value must be an integer.")

num1 = 8
print("Input the number that will divide:")
num2 = int(input())
try:
    result = num1 / num2
    print(result)
except ZeroDivisionError:
    print("Do not divide by zero, that is forbidden.")
except TypeError:
    print("Your input value must be an integer.")
print("The program keeps executing to do other stuff...")

但是还是没有输出我输入的异常。我错过了什么吗？作为参考，我正在使用 picoCTF 的内部网络 shell 预先感谢大家的支持。

Answer 1

ValueError 发生在 int(...) 调用中。如果你想处理它，你需要在该代码周围添加一个 try: 块。例如：

num1 = 8
print("Input the number that will divide:")
num2_str = input()
try:
    num2 = int(num2_str)
except ValueError:
    print(f"this isn't an integer: {num_str}")
    num2 = 0 # or whatever you want the default to be

try:
    result = num1 / num2
    print(result)
except ZeroDivisionError:
    print("Do not divide by zero, that is forbidden.")
except TypeError:
    print("Your input value must be an integer.")
print("The program keeps executing to do other stuff...")

为什么 TextError 异常在此代码中无法正常运行？

Why do TextError exceptions not function properly in this code?

python

exception

try-except

ctf