diff options
Diffstat (limited to 'Doc/library/re.rst')
| -rw-r--r-- | Doc/library/re.rst | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/Doc/library/re.rst b/Doc/library/re.rst index d8ead68..07623c9 100644 --- a/Doc/library/re.rst +++ b/Doc/library/re.rst @@ -414,17 +414,24 @@ Most of the standard escapes supported by Python string literals are also accepted by the regular expression parser:: \a \b \f \n - \r \t \v \x - \\ + \r \t \u \U + \v \x \\ (Note that ``\b`` is used to represent word boundaries, and means "backspace" only inside character classes.) +``'\u'`` and ``'\U'`` 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 there are three octal digits, it is considered an octal escape. Otherwise, it is a group reference. As for string literals, octal escapes are always at most three digits in length. +.. versionchanged:: 3.3 + The ``'\u'`` and ``'\U'`` escape sequences have been added. + + .. _contents-of-module-re: |