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Diffstat (limited to 'Doc/library/re.rst')
| -rw-r--r-- | Doc/library/re.rst | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/Doc/library/re.rst b/Doc/library/re.rst index ac6455a..b512830 100644 --- a/Doc/library/re.rst +++ b/Doc/library/re.rst @@ -371,6 +371,8 @@ The special characters are: ``(?#...)`` A comment; the contents of the parentheses are simply ignored. +.. index:: single: (?=; in regular expressions + ``(?=...)`` Matches if ``...`` matches next, but doesn't consume any of the string. This is called a :dfn:`lookahead assertion`. For example, ``Isaac (?=Asimov)`` will match |