[Python-Dev] Updates to PEP 471, the os.scandir() proposal

Ethan Furman ethan at stoneleaf.us
Wed Jul 9 20:29:50 CEST 2014

On 07/09/2014 11:04 AM, Paul Moore wrote:
> On 9 July 2014 17:35, Ethan Furman <ethan at stoneleaf.us> wrote:
>> More specifically, if we go with choice 1 (no built-in error handling, no
>> mutable DirEntry), how would I implement choice 2?  Would I have to write my
>> own CustomDirEntry object?
> Having built-in error handling is, I think, a key point. That's where
> #1 really falls down.
> But a mutable DirEntry and/or letting onerror manipulate the result is
> a lot more than just having a hook for being notified of errors. That
> seems to me to be a step too far, in the current context.
> Specifically, the tree size example doesn't need it.
> Do you have a compelling use case that needs a mutable DirEntry? It
> feels like YAGNI to me.

Not at this point.  As I indicated in my reply to your response, as long as we have the onerror machinery now we can 
tweak it later if real-world use shows it would be beneficial.


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