为什么多重继承的异常不能捕获父异常？

Question

我假设以下代码应该打印 (“CustomExceptionALL”)，但如果我们引发 CustomException1CustomException2或CustomException3在CustomExceptionALL工作时，这种情况永远不会发生。为什么except CustomExceptionALL抓不到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

用例更多地是相反的：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)