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| author | Raymond Hettinger <python@rcn.com> | 2010-12-03 02:09:34 (GMT) |
|---|---|---|
| committer | Raymond Hettinger <python@rcn.com> | 2010-12-03 02:09:34 (GMT) |
| commit | d8ff4658fb5884d9536732f7f34848aadd519e17 (patch) | |
| tree | 94c68d7d5582bbddcd56de6a74a742c5144f4bfd /Doc/library/itertools.rst | |
| parent | a7a0e1a0f4248289e00284c115fff54b11f18a53 (diff) | |
| download | cpython-d8ff4658fb5884d9536732f7f34848aadd519e17.zip cpython-d8ff4658fb5884d9536732f7f34848aadd519e17.tar.gz cpython-d8ff4658fb5884d9536732f7f34848aadd519e17.tar.bz2 | |
Simplify the signature for itertools.accumulate() to match numpy. Handle one item iterable the same way as min()/max().
Diffstat (limited to 'Doc/library/itertools.rst')
| -rw-r--r-- | Doc/library/itertools.rst | 14 |
1 files changed, 8 insertions, 6 deletions
diff --git a/Doc/library/itertools.rst b/Doc/library/itertools.rst index 56eb452..befc6be 100644 --- a/Doc/library/itertools.rst +++ b/Doc/library/itertools.rst @@ -90,13 +90,15 @@ loops that truncate the stream. parameter (which defaults to :const:`0`). Elements may be any addable type including :class:`Decimal` or :class:`Fraction`. Equivalent to:: - def accumulate(iterable, start=0): + def accumulate(iterable): 'Return running totals' - # accumulate([1,2,3,4,5]) --> 1 3 6 10 15 - total = start - for element in iterable: - total += element - yield total + # accumulate([1,2,3,4,5]) --> 1 3 6 10 15 + it = iter(iterable) + total = next(it) + yield total + for element in it: + total += element + yield total .. versionadded:: 3.2 |