def main():
	usage = "Usage: ./astar.py filename"
	if len(sys.argv) == 1:
		print usage
	else:
		try:
			file = open("map.txt")
			matrix = []
			for line in file:
				matrix.append([])
				for char in line:
					if char != '\n':
						matrix[-1].append(char)
			file.close()
			Astar(matrix)
		except IOError:
			print "No such file or directory: '" + sys.argv[1] + "'"
			print usage


if __name__ == "__main__":
	main()