Add recipe to itertools doc.
diff --git a/Doc/library/itertools.rst b/Doc/library/itertools.rst
index f612a1c..bab1680 100644
--- a/Doc/library/itertools.rst
+++ b/Doc/library/itertools.rst
@@ -653,6 +653,14 @@
pending -= 1
nexts = cycle(islice(nexts, pending))
+ def accumulate(iterable):
+ 'Emit a running total'
+ # accumulate([1,2,3,4,5]) --> 1 3 6 10 15
+ total = 0
+ for element in iterable:
+ total += element
+ yield total
+
def partition(pred, iterable):
'Use a predicate to partition entries into false entries and true entries'
# partition(is_odd, range(10)) --> 0 2 4 6 8 and 1 3 5 7 9