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| author | Mark Dickinson <dickinsm@gmail.com> | 2010-07-30 13:13:54 (GMT) |
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| committer | Mark Dickinson <dickinsm@gmail.com> | 2010-07-30 13:13:54 (GMT) |
| commit | 7ce3f2ccdd318ace6de8515bfcf2ae72ec231a64 (patch) | |
| tree | e9d1e53e7b17e3b8a338408825eec14a18d1a4c0 | |
| parent | 2da63cc338a0356a59ce42cad9af8e1e368c9fbf (diff) | |
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Merged revisions 83277 via svnmerge from
svn+ssh://pythondev@svn.python.org/python/branches/py3k
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r83277 | mark.dickinson | 2010-07-30 14:13:02 +0100 (Fri, 30 Jul 2010) | 1 line
Add note about surprising behaviour from round function.
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| -rw-r--r-- | Doc/library/functions.rst | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/Doc/library/functions.rst b/Doc/library/functions.rst index 5160e08..a287732 100644 --- a/Doc/library/functions.rst +++ b/Doc/library/functions.rst @@ -961,6 +961,13 @@ are always available. They are listed here in alphabetical order. The return value is an integer if called with one argument, otherwise of the same type as *x*. + .. note:: + + The behavior of :func:`round` for floats can be surprising: for example, + ``round(2.675, 2)`` gives ``2.67`` instead of the expected ``2.68``. + This is not a bug: it's a result of the fact that most decimal fractions + can't be represented exactly as a float. See :ref:`tut-fp-issues` for + more information. .. function:: set([iterable]) :noindex: |