From 30bf6e836e4d671fd487673134c6041a6fe77204 Mon Sep 17 00:00:00 2001 From: Raymond Hettinger Date: Sun, 31 Oct 2010 21:27:50 +0000 Subject: [PATCH] Issue 7447: Improve docs for sum(). --- Doc/library/functions.rst | 9 ++++++--- 1 file changed, 6 insertions(+), 3 deletions(-) diff --git a/Doc/library/functions.rst b/Doc/library/functions.rst index e97be7b9d0..5c80f94064 100644 --- a/Doc/library/functions.rst +++ b/Doc/library/functions.rst @@ -1100,10 +1100,13 @@ are always available. They are listed here in alphabetical order. Sums *start* and the items of an *iterable* from left to right and returns the total. *start* defaults to ``0``. The *iterable*'s items are normally numbers, - and are not allowed to be strings. The fast, correct way to concatenate a - sequence of strings is by calling ``''.join(sequence)``. To add floating - point values with extended precision, see :func:`math.fsum`\. + and the start value is not allowed to be a string. + For some use cases, there a good alternatives to :func:`sum`. + The preferred, fast way to concatenate a sequence of strings is by calling + ``''.join(sequence)``. To add floating point values with extended precision, + see :func:`math.fsum`\. To concatenate a series of iterables, consider using + :func:`itertools.chain`. .. function:: super([type[, object-or-type]]) -- 2.40.0