[Python-Dev] Emit SyntaxWarning on unrecognized backslash escapes?

[Guido van Rossum]

I like the \x07 solution.

On Tue, Feb 24, 2015 at 10:47 AM, Ethan Furman <ethan at stoneleaf.us> wrote:

> On 02/24/2015 10:14 AM, Guido van Rossum wrote:
>
> > This is about messages from failing file-open operations if the filename
> contains an escaped character? I'd go slow
> > there too: here are a lot of places where files are opened and messages
> are printed, both in the C code and in the
> > stdlib. I'm not sure I buy the argument that just echoing the repr() of
> the name back doesn't help -- the escapes in
> > there are actually useful in case a filename containing garbage chars
> (or even a trailing space) was read from some
> > other source.
>
> I can attest from my impoverished Windows programming days that looking at
>
>   --> os.listdir('c:\temp')
>   SomeErrorMessage about syntax 'c:\temp'
>
> is not very helpful.  There is zero visual indication that the \ and the t
> are one character, not two.  Changing that
> error message to:
>
>   SomeErrorMessage about syntax 'c:[\t]emp'
>
> or
>
>   SomeErrorMessage about syntax 'c:\x07emp'
>
> or something that shouts out, "hey!  one character in this location!"
> would be a good thing.
>
> --
> ~Ethan~
>
>
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-- 
--Guido van Rossum (python.org/~guido)
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