Add consume() recipe to itertools docs.

diff --git a/Doc/library/itertools.rst b/Doc/library/itertools.rst
index 8855a4616c8a2246a813359f7a514f2d82b4bc5c..2c79b06c9dffda6e36a97fde261dcc527245e23d 100644 (file)
--- a/Doc/library/itertools.rst
+++ b/Doc/library/itertools.rst
@@ -615,6 +615,10 @@ which incur interpreter overhead.
        "Return function(0), function(1), ..."
        return map(function, count(start))
 
+   def consume(iterator, n):
+       "Advance the iterator n-steps ahead. If n is none, consume entirely."
+       collections.deque(islice(iterator, n), maxlen=0)
+
    def nth(iterable, n, default=None):
        "Returns the nth item or a default value"
        return next(islice(iterable, n, None), default)