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Tue Feb 24 10:21:41 CET 2015 · https://mail.python.org/pipermail/python-dev/2015-February/138487.html

On 24.02.15 11:09, Nick Coghlan wrote:
> Oh, I like that idea, especially the variant that includes a search
> friendly phrase like "embedded escapes" in the error message. And
> unlike changing the handling of string literals generally, the impact
> would be isolated to a few exception __repr__ implementations.

It can require changing code in tens of places like 
``PyErr_Format(FooError, "File %R is not valid FOO", filename)`` or 
``raise FooError("File %r is not valid FOO" % (filename,))``.

And of course 'c:\test.txt' is valid name on Unix.

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Showing content from https://mail.python.org/pipermail/python-dev/2015-February/138487.html below:

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