def puzzle(parentNode,history_boards):
global possibleMoves
nodes = 0
while(True):
if reachGoal(parentNode,goal_state):
print "Congradulations! You reach goal after "+str(history_boards[toInt(parentNode)][2])+" moves"
print "Total nodes expanded: ",nodes
print "\n\nThe move process replay blow: \n"
num = toInt(parentNode)
while True:
print "\nAfter "+str(history_boards[num][2])+" moves you got: "
print showBoard(num)
num = history_boards[num][1]
if history_boards[num][2] == 0:
print "\nAfter "+str(history_boards[num][2])+" moves you got: "
print showBoard(num)
return
else:
possible_moves = possibleMoves(parentNode)
for move_tuple in possible_moves:
tmp = parentNode[:]
sonNode = swap(tmp,move_tuple)
if toInt(sonNode) not in history_boards:
nodes +=1
layer = history_boards[toInt(parentNode)][2]
history_boards[toInt(sonNode)] = (cost(sonNode,layer+1),toInt(parentNode),layer+1)
history_boards[toInt(parentNode)] = (sys.maxint,history_boards[toInt(parentNode)][1],history_boards[toInt(parentNode)][2])
parentNode = toList(min(history_boards.iteritems(),key=operator.itemgetter(1))[0])
print "Congradulations! You reach goal after "+str(history_boards[toInt(parentNode)][2])+" moves"
print "Total nodes expanded: ",nodes
print "\n\nThe move process replay blow: \n"
num = toInt(parentNode)
while True:
print "\nAfter "+str(history_boards[num][2])+" moves you got: "
print showBoard(num)
num = history_boards[num][1]
if history_boards[num][2] == 0:
print "\nAfter "+str(history_boards[num][2])+" moves you got: "
print showBoard(num)
return
else:
possible_moves = possibleMoves(parentNode)
for move_tuple in possible_moves:
tmp = parentNode[:]
sonNode = swap(tmp,move_tuple)
if toInt(sonNode) not in history_boards:
nodes +=1
layer = history_boards[toInt(parentNode)][2]
history_boards[toInt(sonNode)] = (cost(sonNode,layer+1),toInt(parentNode),layer+1)
history_boards[toInt(parentNode)] = (sys.maxint,history_boards[toInt(parentNode)][1],history_boards[toInt(parentNode)][2])
parentNode = toList(min(history_boards.iteritems(),key=operator.itemgetter(1))[0])
if __name__ == "__main__":
history_boards = {}
history_boards[toInt(initial_state)]=(cost(initial_state,0),0,0)
puzzle(initial_state,history_boards)
