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bpo-37134: Use PEP570 syntax for sum() #13851

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pablogsal merged 2 commits into from
Jun 5, 2019
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bpo-37134: Use PEP570 syntax for sum() #13851

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Use PEP570 syntax for sum()
pablogsal Jun 5, 2019
e035eee
fixup! Use PEP570 syntax for sum()
pablogsal Jun 5, 2019
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6 changes: 3 additions & 3 deletions Doc/library/functions.rst
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Expand Up @@ -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
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