[Tutor] please return flys in ointment

[Dave Angel]

On 07/08/2013 01:57 PM, Jim Mooney wrote:
> On 8 July 2013 00:12, Steven D'Apranocatching ArithmeticError
>
>> further on), please use a custom exception
>>
>
> Well, an Arithmetic Error was better than bubbling up to a totally general
> one. I'm not sure how do custom error code. Short example, please ;')
>
> Jim
>

I think a ValueError might be best.  See the description:

http://docs.python.org/2/library/exceptions.html#exceptions.ValueError

exception ValueError
Raised when a built-in operation or function receives an argument that 
has the right type but an inappropriate value, and the situation is not 
described by a more precise exception such as IndexError.

To make a custom error, first pick another error that's a superset of 
what you're doing.  Then simply derive your error class from it.  As a 
minimum:

class TooHugeError (ValueError):
     pass





-- 
DaveA