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| author | Raymond Hettinger <rhettinger@users.noreply.github.com> | 2023-08-08 17:30:33 (GMT) |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2023-08-08 17:30:33 (GMT) |
| commit | aab6f7173a3b825599629dd6fa5cb7e477421595 (patch) | |
| tree | 733c4cfc21fdf2e7b776da2f3199a83476b86506 | |
| parent | d4ac094cf9d15ec5705ec0fe8771df9e6ba915b9 (diff) | |
| download | cpython-aab6f7173a3b825599629dd6fa5cb7e477421595.zip cpython-aab6f7173a3b825599629dd6fa5cb7e477421595.tar.gz cpython-aab6f7173a3b825599629dd6fa5cb7e477421595.tar.bz2 | |
GH-100425: Note improved commutativity in sum(). (GH-107785)
| -rw-r--r-- | Doc/library/functions.rst | 2 | ||||
| -rw-r--r-- | Doc/whatsnew/3.12.rst | 4 |
2 files changed, 3 insertions, 3 deletions
diff --git a/Doc/library/functions.rst b/Doc/library/functions.rst index b271067..88a7fdf 100644 --- a/Doc/library/functions.rst +++ b/Doc/library/functions.rst @@ -1752,7 +1752,7 @@ are always available. They are listed here in alphabetical order. The *start* parameter can be specified as a keyword argument. .. versionchanged:: 3.12 Summation of floats switched to an algorithm - that gives higher accuracy on most builds. + that gives higher accuracy and better commutativity on most builds. .. class:: super() diff --git a/Doc/whatsnew/3.12.rst b/Doc/whatsnew/3.12.rst index 6553013..8ed4354 100644 --- a/Doc/whatsnew/3.12.rst +++ b/Doc/whatsnew/3.12.rst @@ -504,8 +504,8 @@ Other Language Changes * :class:`slice` objects are now hashable, allowing them to be used as dict keys and set items. (Contributed by Will Bradshaw, Furkan Onder, and Raymond Hettinger in :gh:`101264`.) -* :func:`sum` now uses Neumaier summation to improve accuracy when summing - floats or mixed ints and floats. +* :func:`sum` now uses Neumaier summation to improve accuracy and commutativity + when summing floats or mixed ints and floats. (Contributed by Raymond Hettinger in :gh:`100425`.) * Exceptions raised in a typeobject's ``__set_name__`` method are no longer |