On Wed, Apr 16, 2008 at 6:53 PM, Greg Ewing <[EMAIL PROTECTED]> wrote:
...
> > open("ัะตัั") # filename is in koi8-r encoding
> > IOError: [Errno 2] No such file or directory: '\xd4\xc5\xd3\xd4'
>
> In that particular case, I'd say the IOError constructor
> is doing the wrong thing -- it should be using something
> like
>
> "No such file or directory: '%s'" % filename\
>
> instead of
>
> "No such file or directory: %r" % filename
>
> i.e. %r shouldn't be used as a quick and dirty way to
> get a string quoted.
I disagree: I always recommend using %r to display (in an error
message, log entry, etc), a string that may be in error, NOT '%s',
because the cause of the error can often be that the string mistakenly
contains otherwise-invisible characters -- %r will show them clearly
(as escape sequences), while %s could hide them and lead anybody but
the most experienced developer to a long and frustrating debugging
session.
Alex
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