def main():
(options, args) = parse_args()
cardsFilePath = args[0]
tape = Tape(options.defaultValue, options.tapeSize)
maxIterations = options.maxIterations
with open(cardsFilePath, "r") as handle:
cards = json.load(handle)
currentState = "start"
iterationCount = 0
while (currentState != "halt") and (iterationCount < maxIterations):
instructions = cards[currentState][tape.read()]
tape.write(instructions["write"])
tape.move(instructions["move"])
currentState = instructions["next"]
print currentState
print tape.statusToString()
iterationCount += 1
if currentState != "halt":
print "maximum iterations exceeded!"
