Most of the standard escapes supported by Python string literals are also
accepted by the regular expression parser::
- \a \b \f \n \N{name}
+ \a \b \f \n \N
\r \t \u \U
\v \x \\
(Note that ``\b`` is used to represent word boundaries, and means "backspace"
only inside character classes.)
-``'\u'``, ``'\U'``, and ``'\N{name}'`` escape sequences are only recognized in Unicode
+``'\u'``, ``'\U'``, and ``'\N'`` escape sequences are only recognized in Unicode
patterns. In bytes patterns they are not treated specially.
Octal escapes are included in a limited form. If the first digit is a 0, or if