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Fix-up moving average example.

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Raymond Hettinger 2009-05-22 01:11:26 +00:00
parent bd16edd305
commit d40285a986
1 changed files with 2 additions and 3 deletions
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5
Doc/library/collections.rst
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@ -455,10 +455,9 @@ added elements by appending to the right and popping to the left::
# moving_average([40, 30, 50, 46, 39, 44]) --> 40.0 42.0 45.0 43.0 # moving_average([40, 30, 50, 46, 39, 44]) --> 40.0 42.0 45.0 43.0
# http://en.wikipedia.org/wiki/Moving_average # http://en.wikipedia.org/wiki/Moving_average
it = iter(iterable) it = iter(iterable)
d = deque(itertools.islice(it, n)) d = deque(itertools.islice(it, n-1))
d.appendleft(0)
s = sum(d) s = sum(d)
if len(d) == n:
yield s / n
for elem in it: for elem in it:
s += elem - d.popleft() s += elem - d.popleft()
d.append(elem) d.append(elem)