From: Miss Islington (bot) <31488909+miss-islington@users.noreply.github.com> Date: Wed, 5 Jun 2019 23:21:08 +0000 (-0700) Subject: bpo-37134: Use PEP570 syntax for sum() (GH-13851) X-Git-Tag: v3.8.0b2~193 X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=23f41a64ea668296fa89e25f3cfa11f63026ecac;p=python bpo-37134: Use PEP570 syntax for sum() (GH-13851) (cherry picked from commit c4c421d619baf2ff2f7e09f55b7ae22b8f863c7b) Co-authored-by: Pablo Galindo --- diff --git a/Doc/library/functions.rst b/Doc/library/functions.rst index 415a65b494..8897705672 100644 --- a/Doc/library/functions.rst +++ b/Doc/library/functions.rst @@ -1562,11 +1562,11 @@ are always available. They are listed here in alphabetical order. about strings, see :ref:`textseq`. -.. function:: sum(iterable[, start]) +.. function:: sum(iterable, /, start=0) 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 the start value is not allowed to be a string. + total. The *iterable*'s items are normally numbers, and the start value is not + allowed to be a string. For some use cases, there are good alternatives to :func:`sum`. The preferred, fast way to concatenate a sequence of strings is by calling