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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