Design: Idiom for classes and methods that are customizable by the user?

[Dirk Bächle]

Hi Marko,

thank you very much for your quick reply.

On 13.05.2016 00:01, Marko Rauhamaa wrote:
>>
>> [...]
>>
>> - Is this a good approach
>
> As an approach, that looks ok. The code looks a bit too lenient, though,
> which can easily surprise and baffle the user. I think it would be
> better to fail:
>
> ========================================================================
> class AlreadyExistsError(Exception):
>     pass
>
> [...]
>

Sure, I'll have exceptions in mind for the final implementation.

>
> [...]
>
> For example, why do you need a key? Couldn't you simply pass the task
> master class as an argument?
>

The idea behind this is, to be able to select classes by giving a parameter on the command-line. So at some point a translation from 
a given "key" to its actual class has to happen, I guess.

Regards,

Dirk