[Python-Dev] IO module precisions and exception hierarchy

[James Y Knight]

On Sep 27, 2009, at 4:20 AM, Pascal Chambon wrote:
> Thus, at the moment IOErrors rather have the semantic of "particular  
> case of OSError", and it's kind of confusing to have them remain in  
> their own separate tree... Furthermore, OSErrors are often used  
> where IOErrors would perfectly fit, eg. in low level I/O functions  
> of the OS module.
> Since OSErrors and IOErrors are slightly mixed up when we deal with  
> IO operations, maybe the easiest way to make it clearer would be to  
> push to their limits already existing designs.

How about just making IOError = OSError, and introducing your proposed  
subclasses? Does the usage of IOError vs OSError have *any* useful  
semantics?

James