This whole thread would be an excellent justification for following 3.9
with 4.0. It's as near as we ever want to get to a breaking change, and a
major version number would indicate the need to review. If increasing
strictness of escape code interpretation in string literals is the only
incompatibility there would surely be general delight.
Kind regards,
Steve Holden
On Wed, Aug 7, 2019 at 8:19 PM eryk sun <eryk...@gmail.com> wrote:
> On 8/7/19, Steve Dower <steve.do...@python.org> wrote:
> >
> > * change the PyErr_SetExcFromWindowsErrWithFilenameObjects function to
> > append (or chain) an extra message when either of the filenames contains
> c
> > control characters (or change OSError to do it, or the default
> > sys.excepthook)
>
> On a related note for Windows, if the error is specifically
> ERROR_INVALID_NAME, we could extend this to look for and warn about
> the five reserved wildcard characters (asterisk, question mark, double
> quote, less than, greater than), pipe, and colon. It's only sometimes
> the case for colon because it's allowed in device names and used as
> the name and type delimiter for stream names.
>
> Kernel object names don't reserve wildcard characters, pipe, and
> colon. So I wouldn't want anything but the control-character warning
> if it's say ERROR_FILE_NOT_FOUND. An example would be
> SharedMemory(name='Global\test'), or a similar error for registry key
> and value names such as OpenKey(hkey, 'spam\test'), that is if winreg
> were updated to include the name in the exception. Note that forward
> slash is just a name character in these cases, not a path separator,
> so we have to use backslash, even if just via replace('/', '\\').
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