diff options
| author | Mark Dickinson <dickinsm@gmail.com> | 2010-07-30 13:16:07 (GMT) |
|---|---|---|
| committer | Mark Dickinson <dickinsm@gmail.com> | 2010-07-30 13:16:07 (GMT) |
| commit | 19746cb322095a82f9792bc6806ba66dcc886973 (patch) | |
| tree | eb3cc793173d56465efe64217c476efad7407a71 | |
| parent | d5d3256cace91a089e3d67a834c7785fda6807ef (diff) | |
| download | cpython-19746cb322095a82f9792bc6806ba66dcc886973.zip cpython-19746cb322095a82f9792bc6806ba66dcc886973.tar.gz cpython-19746cb322095a82f9792bc6806ba66dcc886973.tar.bz2 | |
Merged revisions 83277 via svnmerge from
svn+ssh://pythondev@svn.python.org/python/branches/py3k
........
r83277 | mark.dickinson | 2010-07-30 14:13:02 +0100 (Fri, 30 Jul 2010) | 1 line
Add note about surprising behaviour from round function.
........
| -rw-r--r-- | Doc/library/functions.rst | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/Doc/library/functions.rst b/Doc/library/functions.rst index e54faae..f5ff69e 100644 --- a/Doc/library/functions.rst +++ b/Doc/library/functions.rst @@ -1095,6 +1095,14 @@ available. They are listed here in alphabetical order. example, ``round(0.5)`` is ``1.0`` and ``round(-0.5)`` is ``-1.0``). + .. 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: |