自定义异常类不是打印错误，而是输入错误

Question

我有一个自定义异常，我想使用它，类似于下面的。当我处理异常时，我希望我的消息打印错误-即；ShortPasswordError:Luke"-而不仅仅是密码-"；卢克"；。这就是我所说的。

class AuthenticationError(ValueError):
pass
class ShortPasswordError(AuthenticationError):
pass 
def createPassword(password):
if len(password) < 10: 
raise ShortPasswordError(password)
password = input("Enter a password: ")

try: 
createPassword(password)
except AuthenticationError as e: 
print(f"Looks like there's an error with your password. Does {e} ring any bells?")

以下是目前正在发生的事情

Enter a password: Luke
Looks like there's an error with your password. Does Luke ring any bells?

Answer 1

使用repr而不是str来格式化f字符串中的异常。

print(f"Looks like there's an error with your password. Does {e!r} ring any bells?")

这将产生

$ python3 tmp.py
Enter a password: Luke
Looks like there's an error with your password. Does ShortPasswordError('Luke') ring any bells?