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| -rw-r--r-- | Doc/library/itertools.rst | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/Doc/library/itertools.rst b/Doc/library/itertools.rst index 1f0bced..c5ba2eb 100644 --- a/Doc/library/itertools.rst +++ b/Doc/library/itertools.rst @@ -662,6 +662,11 @@ which incur interpreter overhead. "Return function(0), function(1), ..." return map(function, count(start)) + def tail(n, iterable): + "Return an iterator over the last n items" + # tail(3, 'ABCDEFG') --> E F G + return iter(collections.deque(iterable, maxlen=n)) + def consume(iterator, n): "Advance the iterator n-steps ahead. If n is none, consume entirely." # Use functions that consume iterators at C speed. |