def astar_search(problem, h=None):
    """A* search is best-first graph search with f(n) = g(n)+h(n).
    You need to specify the h function when you call astar_search, or
    else in your Problem subclass."""
    h = memoize(h or problem.h, 'h')
    return best_first_graph_search(problem, lambda n: n.path_cost + h(n))
def astar_search(problem, h=None):
    """A* search is best-first graph search with f(n) = g(n)+h(n).
    You need to specify the h function when you call astar_search, or
    else in your Problem subclass."""
    h = memoize(h or problem.h, 'h')
    return best_first_graph_search(problem, lambda n: n.path_cost + h(n))
def astar_search ( problem , h = None ) : h = memoize ( h or problem . h , 'h' ) return best_first_graph_search ( problem , lambda n : n . path_cost + h ( n ) )
A* search is best-first graph search with f(n) = g(n)+h(n).
    You need to specify the h function when you call astar_search, or
    else in your Problem subclass.
A * search is best - first graph search with f ( n ) = g ( n ) + h ( n ) . You need to specify the h function when you call astar_search or else in your Problem subclass .