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

Paul Moore p.f.moore at gmail.com
Wed Jul 9 15:30:32 CEST 2014

On 9 July 2014 14:22, Ben Hoyt <benhoyt at gmail.com> wrote:

So maybe the onerror function should also receive the DirEntry object - which will only have the name and fullname attributes, but that's all that is needed. That's an interesting idea -- though enough of a deviation from os.walk()'s onerror that I'm uncomfortable with it -- I'd rather just document that the onerror exception .filename is the full path name.

But the onerror exception will come from the lstat call, so it'll be a raw OSError (unless scandir modifies it, which may be what you're thinking of). And if so, aren't we at the mercy of what the OS module gives us? That's why I said we can't guarantee it. I looked at the documentation of OSError (in "Built In Exceptions"), and all it says is "the filename" (unqualified). I'd expect that to be "whatever got passed to the underlying OS API" - which may well be an absolute pathname if we're lucky, but who knows? (I'd actually prefer it if OSError guaranteed a full pathname, but that's a bigger issue...)

Paul

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