def h2(n, goalState):
state = n.state
count = 0
while state != goalState:
emptyPos = getSpacePosition(state)
emptyGoalPos = getSpacePosition(goalState)
if emptyPos != emptyGoalPos:
# Move right value in the position of the space
value = goalState[emptyPos[0]][emptyPos[1]]
rightValuePos = getValuePosition(state, value)
state = swapValuesInPuzzle(emptyPos, rightValuePos, state)
else:
# Get wrong value position
wrongValuePos = []
for i in range(len(state)):
for j in range(len(state[i])):
if state[i][j] != 0 and state[i][j] != goalState[i][j]:
wrongValuePos = [i, j]
break
# Swap with empty position
state = swapValuesInPuzzle(emptyPos, wrongValuePos, state)
count += 1
return count
def h2(n, goalState):
state = n.state
count = 0
while state != goalState:
emptyPos = getSpacePosition(state)
emptyGoalPos = getSpacePosition(goalState)
if emptyPos != emptyGoalPos:
# Move right value in the position of the space
value = goalState[emptyPos[0]][emptyPos[1]]
rightValuePos = getValuePosition(state, value)
state = swapValuesInPuzzle(emptyPos, rightValuePos, state)
else:
# Get wrong value position
wrongValuePos = []
for i in range(len(state)):
for j in range(len(state[i])):
if state[i][j] != 0 and state[i][j] != goalState[i][j]:
wrongValuePos = [i, j]
break
# Swap with empty position
state = swapValuesInPuzzle(emptyPos, wrongValuePos, state)
count += 1
return count
def makeRandomMove(state, n, lastAction) :
spacePos = getSpacePosition(state)
validActions = getValidActions(spacePos, n)
action = random.choice(validActions)
# Do not go to previous position just yet.
while True:
if lastAction == "up":
if action == "down":
validActions.remove(action)
action = random.choice(validActions)
else:
break
elif lastAction == "down":
if action == "up":
validActions.remove(action)
action = random.choice(validActions)
else:
break
elif lastAction == "left":
if action == "right":
validActions.remove(action)
action = random.choice(validActions)
else:
break
elif lastAction == "right":
if action == "left":
validActions.remove(action)
action = random.choice(validActions)
else:
break
else:
break
lastAction = action
spacePosition = getSpacePosition(state)
if action == "up" :
targetPosition = [spacePosition[0] - 1, spacePosition[1]]
elif action == "down" :
targetPosition = [spacePosition[0] + 1, spacePosition[1]]
elif action == "left" :
targetPosition = [spacePosition[0], spacePosition[1] - 1]
elif action == "right" :
targetPosition = [spacePosition[0], spacePosition[1] + 1]
else :
print "ERROR: invalid action"
retState = swapValuesInPuzzle(spacePosition, targetPosition, state)
return (retState, lastAction)
def makeRandomMove(state, n, lastAction):
spacePos = getSpacePosition(state)
validActions = getValidActions(spacePos, n)
action = random.choice(validActions)
# Do not go to previous position just yet.
while True:
if lastAction == "up":
if action == "down":
validActions.remove(action)
action = random.choice(validActions)
else:
break
elif lastAction == "down":
if action == "up":
validActions.remove(action)
action = random.choice(validActions)
else:
break
elif lastAction == "left":
if action == "right":
validActions.remove(action)
action = random.choice(validActions)
else:
break
elif lastAction == "right":
if action == "left":
validActions.remove(action)
action = random.choice(validActions)
else:
break
else:
break
lastAction = action
spacePosition = getSpacePosition(state)
if action == "up":
targetPosition = [spacePosition[0] - 1, spacePosition[1]]
elif action == "down":
targetPosition = [spacePosition[0] + 1, spacePosition[1]]
elif action == "left":
targetPosition = [spacePosition[0], spacePosition[1] - 1]
elif action == "right":
targetPosition = [spacePosition[0], spacePosition[1] + 1]
else:
print "ERROR: invalid action"
retState = swapValuesInPuzzle(spacePosition, targetPosition, state)
return (retState, lastAction)
def result(self, state, action):
""" The state as a result of given action on given state"""
spacePosition = getSpacePosition(state)
if action == "up":
targetPosition = [spacePosition[0] - 1, spacePosition[1]]
elif action == "down":
targetPosition = [spacePosition[0] + 1, spacePosition[1]]
elif action == "left":
targetPosition = [spacePosition[0], spacePosition[1] - 1]
elif action == "right":
targetPosition = [spacePosition[0], spacePosition[1] + 1]
else:
print "ERROR: invalid action"
retState = swapValuesInPuzzle(spacePosition, targetPosition, state)
# printState(retState)
# print
return retState
def result(self, state, action):
""" The state as a result of given action on given state"""
spacePosition = getSpacePosition(state)
if action == "up":
targetPosition = [spacePosition[0] - 1, spacePosition[1]]
elif action == "down":
targetPosition = [spacePosition[0] + 1, spacePosition[1]]
elif action == "left":
targetPosition = [spacePosition[0], spacePosition[1] - 1]
elif action == "right":
targetPosition = [spacePosition[0], spacePosition[1] + 1]
else:
print "ERROR: invalid action"
retState = swapValuesInPuzzle(spacePosition, targetPosition, state)
# printState(retState)
# print
return retState
def actions(self, state):
"""Returns the actions that can be executed in the state"""
return getValidActions(getSpacePosition(state), self.n)
def actions(self, state):
"""Returns the actions that can be executed in the state"""
return getValidActions(getSpacePosition(state), self.n)
