Add consume() recipe to itertools docs.

diff --git a/Doc/library/itertools.rst b/Doc/library/itertools.rst
index baa3566edfaf7e9fda11564347a51919633f2ddc..d4d130fea6d6694504694476d90569f3ccb2ac58 100644 (file)
--- a/Doc/library/itertools.rst
+++ b/Doc/library/itertools.rst
@@ -635,6 +635,10 @@ which incur interpreter overhead.
        "Return function(0), function(1), ..."
        return imap(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)