203 def nlargest(n, iterable):  argument
210     it = iter(iterable)
221 def nsmallest(n, iterable):  argument
228     it = iter(iterable)
399 def nsmallest(n, iterable, key=None):  argument
406         it = iter(iterable)
416         size = len(iterable)
421             return sorted(iterable, key=key)[:n]
425         it = izip(iterable, count())                        # decorate
430     in1, in2 = tee(iterable)
436 def nlargest(n, iterable, key=None):  argument
444         it = iter(iterable)
454         size = len(iterable)
459             return sorted(iterable, key=key, reverse=True)[:n]
463         it = izip(iterable, count(0,-1))                    # decorate
468     in1, in2 = tee(iterable)