[Tutor] Most pythonic input validation

[Dave Angel]

Kent Johnson wrote:
> <snip>
>
>   
>> Is this the way to define my own error and to use it:
>>
>> class MyValueError(Exception):
>>  define initialization and printing
>>     
>
> You usually don't need to define anything extra, the Exception methods are fine.
>
>   
>
I think there could  be confusion over what you meant was unnecessary.

It's a "good thing" to define MyValueError(Exception), but it's usually 
unnecessary to give it a body, because the methods it inherits from 
Exception are usually just fine.


DaveA