python - 为什么一个多重继承的Exception没有捕捉到父异常？

Question

我假设以下代码假设打印 ("CustomExceptionALL")，但如果我们在 CustomExceptionALL 时引发 CustomException1、CustomException2 或 CustomException3，那永远不会发生 有效。为什么 except CustomExceptionALL 没有捕获 CustomException3？

class CustomException1(Exception):
    pass

class CustomException2(Exception):
    pass

class CustomException3(Exception):
    pass

class CustomExceptionALL(CustomException1, CustomException2, CustomException3):
    pass

try:
    raise CustomException3
except CustomExceptionALL as e:
    print("CustomExceptionALL")
except Exception as e:
    print(e)

Answer 1

用例更多的是相反的方式:引发派生异常，然后使用父类捕获它。例如:

class Brexit(Exception):
    pass

class Covid(Exception):
    pass

class DoubleWhammy(Brexit, Covid):
    pass

try:
    raise DoubleWhammy
except Brexit as e:
    print("Brexit")
except Exception as e:
    print(e)