aima/search.py
def iterative_deepening_search(problem):
    "[Fig. 3.18]"
    for depth in xrange(sys.maxint):
        result = depth_limited_search(problem, depth)
        if result != 'cutoff':
            return result
def iterative_deepening_search(problem):
    "[Fig. 3.18]"
    for depth in xrange(sys.maxint):
        result = depth_limited_search(problem, depth)
        if result != 'cutoff':
            return result
[Fig. 3.18]