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

Ethan Furman ethan at stoneleaf.us
Wed Jul 9 21:17:43 CEST 2014

On 07/09/2014 12:03 PM, Ben Hoyt wrote:

So here's the ways in which option #2 is now more complicated than option #1: 1) it has an additional "info" argument, the values of which have to be documented ('os', 'type', 'lstat', and what each one means) 2) it has an additional "onerror" argument, the signature of which and fairly complicated return value is non-obvious and has to be documented 3) it requires user modification of the DirEntry object, which needs documentation, and is potentially hard to implement 4) because the DirEntry object now allows modification, you need a statresult() helper function to help you build your own stat values I'm afraid points 3 and 4 here add way too much complexity.

I'm okay with dropping 3 and 4, and making the return from onerror being simply True to yield the entry, and False/None to skip it. That should make implementation much easier, and documentation not too strenuous either.

-- Ethan

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