[Python-Dev] Emit SyntaxWarning on unrecognized backslash escapes? (original) (raw)

Guido van Rossum guido at python.org
Tue Feb 24 19:49:56 CET 2015

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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