I think that's a bit too strong. This has been unquestionably valid,
correct Python -- it was an intentional feature from the start. It may not
have turned out great, but I think that before warning loudly about every
instance of this we should have a silent deprecation (which you can turn
into a visible warning with a command-line flag or a warnings filter). And
we should have agreement that we're eventually going to make it a syntax
error.

On Mon, Feb 23, 2015 at 1:57 AM, Serhiy Storchaka <storch...@gmail.com>
wrote:

> See topic "Unrecognized backslash escapes in string literals" in Python
> list [1]. I agree that this is a problem, especially for novices (but even
> experience users can make a typo). May be emit SyntaxWarning on
> unrecognized backslash escapes? An exception is already raised on invalid
> octal or hexadecimal escapes. '\x' is syntax error, not two characters '\\'
> and 'x'.
>
> [1] http://comments.gmane.org/gmane.comp.python.general/772455
>
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--Guido van Rossum (python.org/~guido)
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