On Thu, Dec 7, 2017 at 3:02 PM, Victor Stinner <victor.stin...@gmail.com> wrote:
> 2017-12-06 5:07 GMT+01:00 INADA Naoki <songofaca...@gmail.com>: > > And opening binary file without "b" option is very common mistake of new > > developers. If default error handler is surrogateescape, they lose a > chance > > to notice their bug. > > To come back to your original point, I didn't know that it was a > common mistake to open binary files in text mode. > It probably is because in Python 2 it makes no difference on UNIX, and on Windows the only difference is that binary mode preserves \r. > Honestly, I didn't try recently. How does Python behave when you do that? > > Is it possible to write a full binary parser using the text mode? You > should quickly get issues pointing you to your mistake, no? > You will quickly get decoding errors, and that is INADA's point. (Unless you use encoding='Latin-1'.) His worry is that the surrogateescape error handler makes it so that you won't get decoding errors, and then the failure mode is much harder to debug. -- --Guido van Rossum (python.org/~guido)
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