sys.exit(2)
else:
try:
inputhandler=Inputhandler()
MAP=inputhandler.filetostr(sys.argv[1])
except IOError:
sys.stderr.write("ERROR: Cannot read inputfile\n")
sys.exit(1)
# this section of inputing files is referred from the codes provided in NLP course, Columbia University, COMS 4705 2013
inputhandler=Inputhandler()
warehouse=Warehouse(MAP)
warehouse.setiniworkerposi()
print ("The configuration of the input:")
warehouse.show()
root=node(warehouse) # load to the tree
instr=""
solution=""
while(1):
print("\nplease choose the searching method:\nb :BFS\nd :DFS\nu :UCS")
print("g_1 :Greedy best first search (heuristic 1)")
print("g_2 :Greedy best first search (heuristic 2)")
print("a_1 :A* search (heuristic 1)")
print("a_2 :A* search (heuristic 2)")
print("Others :quit")
