[Python-ideas] Make undefined escape sequences have SyntaxWarnings

[Mike Graham]

On Wed, Oct 10, 2012 at 3:46 PM, Antoine Pitrou <solipsis at pitrou.net> wrote:
> On Wed, 10 Oct 2012 15:36:08 -0400
> Mike Graham <mikegraham at gmail.com> wrote:
>> The literal"\c" should be an error but in practice means "\\c". It's
>> probably too late to make this invalid syntax as it out to be, but I
>> wonder if a warning isn't in order, especially with the theoretical
>> potential of adding new string escapes in the future.
>
> -1. This will make life more difficult with regular expressions (and
> produce lots of spurious warnings in existing code).
>
> Regards
>
> Antoine.

Regular expressions are difficult if you're remembering which escape
sequences exist and are easy if you're using raw string literals.

Mike