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| author | Georg Brandl <georg@python.org> | 2010-03-21 09:51:44 (GMT) |
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| committer | Georg Brandl <georg@python.org> | 2010-03-21 09:51:44 (GMT) |
| commit | 718ce2c2bd96910c09ed4ad7a2cfcd0b31720fe3 (patch) | |
| tree | 487782486ac830406915cd34edf302bedd1085f4 /Doc/tutorial | |
| parent | 58bfdcaceed64a2107b5125c7ab7ff9396074b0e (diff) | |
| download | cpython-718ce2c2bd96910c09ed4ad7a2cfcd0b31720fe3.zip cpython-718ce2c2bd96910c09ed4ad7a2cfcd0b31720fe3.tar.gz cpython-718ce2c2bd96910c09ed4ad7a2cfcd0b31720fe3.tar.bz2 | |
Merged revisions 79179 via svnmerge from
svn+ssh://pythondev@svn.python.org/python/trunk
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r79179 | georg.brandl | 2010-03-21 10:37:54 +0100 (So, 21 Mär 2010) | 1 line
Mention inefficiency of lists as queues, add link to collections.deque discussion.
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Diffstat (limited to 'Doc/tutorial')
| -rw-r--r-- | Doc/tutorial/datastructures.rst | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/Doc/tutorial/datastructures.rst b/Doc/tutorial/datastructures.rst index ef364b2..8cf58c8 100644 --- a/Doc/tutorial/datastructures.rst +++ b/Doc/tutorial/datastructures.rst @@ -153,6 +153,11 @@ the queue, use :meth:`pop` with ``0`` as the index. For example:: >>> queue ['Michael', 'Terry', 'Graham'] +However, since lists are implemented as an array of elements, they are not the +optimal data structure to use as a queue (the ``pop(0)`` needs to move all +following elements). See :ref:`tut-list-tools` for a look at +:class:`collections.deque`, which is designed to work efficiently as a queue. + .. _tut-listcomps: |