[Python-Dev] pathlib - current status of discussions (original) (raw)

Chris Barker chris.barker at noaa.gov
Wed Apr 13 16:39:42 EDT 2016

so are we worried that fspath will exist and be callable, but might raise an AttributeError somewhere inside itself? if so isn't it broken anyway, so should it be ignored?

and I know it's asking poermission rather than forgiveness, but what's wrong with:

if hasattr(path, "fspath"): path = path.fspath()

if you really want to check for the existence of the attribute first?

or even:

path = path.fspath if hasattr(path, "fspath") else path

(OK, really a Pythonic style question now....)

-CHB

On Wed, Apr 13, 2016 at 12:54 PM, Brett Cannon <brett at python.org> wrote:

On Wed, 13 Apr 2016 at 12:39 Fred Drake <fred at fdrake.net> wrote: On Wed, Apr 13, 2016 at 3:24 PM, Chris Angelico <rosuav at gmail.com> wrote: > Is that the intention, or should the exception catching be narrower? I > know it's clunky to write it in Python, but AIUI it's less so in C: > > try: > callme = path.fspath > except AttributeError: > pass > else: > path = callme()

+1 for this variant; I really don't like masking errors inside the fspath implementation. Don't read too much into the code in that gist. I just did them quickly to get the point across of the proposals in terms of str/bytes, not what will be proposed in any final patch.

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