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authorGeorg Brandl <georg@python.org>2012-03-17 16:25:47 (GMT)
committerGeorg Brandl <georg@python.org>2012-03-17 16:25:47 (GMT)
commit5ec6fdb0f6ffe467ed0cfc630354129fc6bad319 (patch)
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parent12c3cd7c1f090cb055d395a5d54deba955af9d7b (diff)
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Closes #14342: remove out-of-date section about avoiding recursion errors.
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diff --git a/Doc/library/re.rst b/Doc/library/re.rst
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@@ -1090,28 +1090,6 @@ The equivalent regular expression would be ::
(\S+) - (\d+) errors, (\d+) warnings
-Avoiding recursion
-^^^^^^^^^^^^^^^^^^
-
-If you create regular expressions that require the engine to perform a lot of
-recursion, you may encounter a :exc:`RuntimeError` exception with the message
-``maximum recursion limit exceeded``. For example, ::
-
- >>> s = 'Begin ' + 1000*'a very long string ' + 'end'
- >>> re.match('Begin (\w| )*? end', s).end()
- Traceback (most recent call last):
- File "<stdin>", line 1, in ?
- File "/usr/local/lib/python3.2/re.py", line 132, in match
- return _compile(pattern, flags).match(string)
- RuntimeError: maximum recursion limit exceeded
-
-You can often restructure your regular expression to avoid recursion.
-
-Simple uses of the ``*?`` pattern are special-cased to avoid recursion. Thus,
-the above regular expression can avoid recursion by being recast as ``Begin
-[a-zA-Z0-9_ ]*?end``. As a further benefit, such regular expressions will run
-faster than their recursive equivalents.
-
.. _search-vs-match:
search() vs. match()