diff options
Diffstat (limited to 'Doc/library/re.rst')
| -rw-r--r-- | Doc/library/re.rst | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/Doc/library/re.rst b/Doc/library/re.rst index e7d1f05..40e2dcc 100644 --- a/Doc/library/re.rst +++ b/Doc/library/re.rst @@ -421,6 +421,9 @@ The special characters are: some fixed length. Patterns which start with negative lookbehind assertions may match at the beginning of the string being searched. +.. _re-conditional-expression: +.. index:: single: (?(; in regular expressions + ``(?(id/name)yes-pattern|no-pattern)`` Will try to match with ``yes-pattern`` if the group with given *id* or *name* exists, and with ``no-pattern`` if it doesn't. ``no-pattern`` is |