[Python-checkins] r72675 - python/trunk/Doc/reference/datamodel.rst
georg.brandl
python-checkins at python.org
Sat May 16 13:13:22 CEST 2009
Author: georg.brandl
Date: Sat May 16 13:13:21 2009
New Revision: 72675
Log:
#6034: clarify __reversed__ doc.
Modified:
python/trunk/Doc/reference/datamodel.rst
Modified: python/trunk/Doc/reference/datamodel.rst
==============================================================================
--- python/trunk/Doc/reference/datamodel.rst (original)
+++ python/trunk/Doc/reference/datamodel.rst Sat May 16 13:13:21 2009
@@ -1869,11 +1869,11 @@
reverse iteration. It should return a new iterator object that iterates
over all the objects in the container in reverse order.
- If the :meth:`__reversed__` method is not provided, the
- :func:`reversed` builtin will fall back to using the sequence protocol
- (:meth:`__len__` and :meth:`__getitem__`). Objects should normally
- only provide :meth:`__reversed__` if they do not support the sequence
- protocol and an efficient implementation of reverse iteration is possible.
+ If the :meth:`__reversed__` method is not provided, the :func:`reversed`
+ builtin will fall back to using the sequence protocol (:meth:`__len__` and
+ :meth:`__getitem__`). Objects that support the sequence protocol should
+ only provide :meth:`__reversed__` if they can provide an implementation
+ that is more efficient than the one provided by :func:`reversed`.
.. versionadded:: 2.6
More information about the Python-checkins
mailing list