[Tutor] Class as Exception

[Sean 'Shaleh' Perry]

On Saturday 08 February 2003 14:30, Bob Gailer wrote:
> A couple of times I got the following to work. Now I just get an except=
ion.
>
>  >>> class n(str):pass
>  >>> raise n, 'tst'
>
> Traceback (most recent call last):
>    File "<interactive input>", line 1, in ?
> TypeError: exceptions must be strings, classes, or instances, not type
>
> Why would the same code work, then fail?
>

1) when you want an exception, derive from Exception.  class n(Exception)=
=2E

2) I believe you are suppose to raise an instance of the exception class,=
 not=20
the class itself.  "raise n(), 'tst'".