New Python 3.0 string formatting - really necessary?

[Steven D'Aprano]

On Mon, 29 Dec 2008 09:50:14 -0800, walterbyrd wrote:

> On Dec 21, 12:28 pm, Bruno Desthuilliers
> <bdesth.quelquech... at free.quelquepart.fr> wrote:
> 
>> > I can see where the new formatting might be helpful in some cases.
>> > But, I am not sure it's worth the cost.
>>
>> Err... _Which_ cost exactly ?
> 
> Loss of backward compatibility, mainly.

How do you lose backward compatibility by *adding* new functionality? The 
old functionality will continue to work as normal.



-- 
Steven