I am trying to make a text-based interactive story in python, but I keep getting this error: AttributeError: 'NoneType' object has no attribute 'get'

This is in Python, and I need help completing this.

Here is the link to the assignment: http://people.scs.carleton.ca/~arunka/courses/comp1005/tutorials/T07.pdf

approach = {'sceneText': "Following the map from the old man in the tavern, you arrive at a large hill," "covered with ancient standing stone forming the shape of a skull if viewed from a high vantage " "point.", \ 'choices': { "Enter the Tomb of Horrors!": "Entrance", "Run Away! (Wuss)": "Runaway" } }

runaway = { 'sceneText': "You wisely choose to turn tail and flee. This was certainly the only way you could have survived such a daunting terror."}

entrance = { 'sceneText': "Digging out the loose earth around the base of the hill, you uncover three large stone doors " "arranged roughly next to each other.", \ 'choices': { "Open the leftmost door.": "Sealed", "Open the central door.": "Hallway", "Open the rightmost door.": "Collapse" } }

sealed = { 'sceneText': "You open the leftmost door and enter into a long, dark hallway. After prroceeding a long way " "inside, you reach a dead end, only to hear the grinding of stone as the entrance slides closed. Stuck in the " "darkness, your thoughts turn to how that was really unfair."}

collapse = { 'sceneText': "You move to open the rightmost door, attempting to pry it open. YOu hear a switch " "activate, and a massive stone slab suspended over the door falls on you, its thud punctuating an abrupt " "end to your adventure."}

hallway = { 'sceneText': "You open the central doors, and see before you a long hallway lined with ancient " "hieroglyphs. On the far wall is a green demon head sculpture with a dark passage in its mouth " "large enough to pass through, and a gateway shrouded in a purple haze. As you approach, you notice " "one of the hierglyphs portrudes slightly from the wall.", \ 'choices': { "Examine the demon's head at the far end of the hallway.":"Demon" , "Pass through the haze-shrouded gateway.":"PurpleHaze", "Inspect the unusual hieroglyphs":"PitTrap" } }

demon = { 'sceneText': "You move up to the Demon Head sculpture on the wall and peer inside. Despite " "bringing your torch up to it, you cannot see any deeper into it. You reach inside " "expecting to find something, but cannot feel a thing. Turns out you lost an arm. You get outta there."}

purplehaze = { 'sceneText': "A chill passes over you as you pass through the haze-shrouded gateway, as you are " "teleported deeper into the dungeon. Expecting the teleport chills to fade, you are memonetarily " "confused, until you realize the cold was not from the teleportation, rather all your belongings are... gone.", \ 'choices': { "Explore your new surroundings.":"darn" } }

darn = { 'sceneText': "As your eyes adjust to your surroundings you find yourself in a sealed concrete " "room with no doors or windows. Ice lines the cracks of the impenetrable walls... " "Well, darn."}

pittrap = { 'sceneText': "You approach the unusual hieroglyphs, but the floor suddenly gives way, and you fall into a pit trap. " "Regaining your bearings at the bottom, you are relieved that you missed all five of the spikes at the bottom. " "You see a door in front of you leading deeper into the dungeon, and one of the spikes has a hidden switch.", \ 'choices': { "Pass through the door ahead of you.":"Gargoyle", "Throw the switch hidden on the spike.":"MoreSpikes" } }

gargoyle = { 'sceneText': "The door at the bottom of the pit trap opens to a secret chamber. You pass into the darkness and the door " "seals behind you. Ahead, you see a gigantic stone gargoyle with four arms. It shudders and comes to life, drawing four " "massive stone blades the size of a person each. I mean at least you can fight this guy right?... right?"}

morespikes = { 'sceneText': "The secret switch causes the floor to give out, dropping you deeper into a second pit trap. You are less " "relieved to find that this time, you did not miss the poisoned spikes, but momementarily, at least."}

def main(): #Part 3 story = {"Approach":approach, "Runaway":runaway, "Entrance":entrance, "Sealed":sealed, "Collapse":collapse, "Hallway":hallway, "Demon":demon, "PurpleHaze":purplehaze, "Damn":damn, "PitTrap":pittrap, "Gargoyle":gargoyle, "MoreSpikes":morespikes} sceneData = story['Approach']

while(True): #.get metehod returns value for the given key print(sceneData.get('sceneText')) print("Choices: ") for choice in sceneData.get('choices'): print(choice) user_choice = input("Select a choice: ") sceneData = story.get(user_choice)

if __name__ == '__main__': main()

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