From: Raymond Hettinger Date: Sat, 3 Feb 2018 16:46:28 +0000 (-0800) Subject: bpo-32739: Show default value for rotate() (GH-5485) X-Git-Tag: v3.8.0a1~2273 X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=589c718a8e3bde017350f248f7f1c009240eb52b;p=thirdparty%2FPython%2Fcpython.git bpo-32739: Show default value for rotate() (GH-5485) --- diff --git a/Doc/library/collections.rst b/Doc/library/collections.rst index 772ff60fe983..256bf02da47c 100644 --- a/Doc/library/collections.rst +++ b/Doc/library/collections.rst @@ -509,11 +509,14 @@ or subtracting from an empty counter. .. versionadded:: 3.2 - .. method:: rotate(n) + .. method:: rotate(n=1) - Rotate the deque *n* steps to the right. If *n* is negative, rotate to - the left. Rotating one step to the right is equivalent to: - ``d.appendleft(d.pop())``. + Rotate the deque *n* steps to the right. If *n* is negative, rotate + to the left. + + When the deque is empty, rotating one step to the right is equivalent + to ``d.appendleft(d.pop())``, and rotating one step to the left is + equivalent to ``d.append(d.popleft())``. Deque objects also provide one read-only attribute: