[Python-Dev] IO module precisions and exception hierarchy (original) (raw)

Nick Coghlan ncoghlan at gmail.com
Mon Sep 28 14:40:44 CEST 2009

Antoine Pitrou wrote:

Le Mon, 28 Sep 2009 06:41:17 +1000, Nick Coghlan a écrit :

Michael's response cut to the heart of the issue though - a richer IO exception hierarchy can make life interesting for compatibility purposes (especially when creating "file-like" interfaces to non-file objects). Well, not more interesting than currently where you need to replicate errno numbers if you want to make the errors precise enough, since an API consumer wanting to check specific error conditions will discriminate on errno. If you don't want to go to that level of perfection, you just have to raise a plain IOError (or OSError :-)) without bothering about errno or subclasses; like you would do today.

Fair point.

Cheers, Nick.

-- Nick Coghlan | ncoghlan at gmail.com | Brisbane, Australia

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