NameError: name 'Game' is not defined, but it is
Question: I am learning python using the book _Learn python the hard way_. I am doing
one of the exercises, which contains many if loop's. I met an error which says
`Game` is not defined, but I did define it before. Anyone ideas?

    
    
    from sys import exit
    
    from random import randint
    
    class Game(object):
    
        def __init__(self, start):
            self.quips = [
                 "You died. You kinda suck at this.",
                 "Nice job, you died ... jackass.",
                 "Such a luser.",
                 "I have a small puppy that's better at this."]
            slef.start = start
    
        def play(self):
            next = self.start
    
            while True:
                print "\n-------"
                room = getattr(self, next)
                next = room()
    
        def death(self):
            print self.quips[randint(0, len(quips)-1)]
            exit(1)
    
        def central_corridor(self):
            print "The Gothons of Planet Percal #25 have invaded your ship and destroyed"
            print "your entire crew. You are the last surviving member and your last"
            print "mission is to get the neutron destrut bomb from the Weapons Armory,"
            print "put it in the bridge, and blow the ship up after getting into an "
            print "escapr pod."
            print "\n"
            print "You're running down the central corridor to the Weapons Armory when"
            print "a Gothon jumps out, red scaly skin, dark grimy teeth, and evil clown costume"
            print "flowing around his hate filled body. He's blocking the door to thr"
            print "Armory and about to pull a weapon to blast you."
    
            action =raw_input("> ")
    
            if action == "shoot!":
                print "Quick on the draw you yank out your blaster and fire it at the Gothan."
                print "His clown costume is flowing and moving around his body, which throws"
                print "off your aim. Your laser hits new costume but misses him entirely. This"
                print "completely ruins his brand new costumr his mother bought him, which"
                print " makes him fly into an insane rage and blast you repeatedly in the face until"
                print "you are dead. Then he eats you."
                return 'death'
    
            elif action =="dodge!":
                print "Like a world class boxer you dodge, weave, slip and slide right"
                print "as the Gothon's blaster cranks a laser past your head."
                print "In the middle of your artful dodge your foot slips and you"
                print "You wake up shortly after only to die as the Gothon stomps on"
                print "your head and eats you."
                return 'death'
    
            elif action =="tell a joke":
                print "Lucky for you they made you learn Fothon insults in the acsdemy."
                print "You tell teh one Gothon k=joke you know:"
                print "Lbhe zbgure vf fb sng, jura fur fvgf nebhag gur ubhfr, fur fvgf nrbhaq"
                print "The Gothon stops, tries not to laugh, then busts out laughing and can't"
                print "While he's laughing you run up and shoot him square in the head"
                print "putting hm down, then jump through the Weapon Armory door."
                return 'laser_weapon_asmory'
    
            else:
                print "DOES NOT COMPUTE!"
                return 'central_corridor'
    
        def laser_weapon_armory(self):
            print " You do a dive roll into the Weapon Armory, crough and scan the room"
            print "for more Gothans that might be hiding. It's dead quiet, too quiet."
            print "You stand up and run to the far side of the room and find the"
            print "neutron bomb in its container. There's a keypad lock on the code"
            print "and you need the code to get the bomb out. If you get the code"
            print "wrong 10 times then the lock closes forever and you can't"
            print "get the bomb. The code is 3 digits."
            code = "%d%d%d" % (randint(1,9), randint(1,9), randint(1,9))
            guess = raw_input("[keypad]> ")
            guesses = 0
    
            while guess != code and guesses < 10:
                print "BZZZZEDDD!"
                guesses += 1
                guess = raw_input("[keypad]> ")
    
            if guess == code:
                print "The container clicks open and the seal breaks, letting gas out."
                print "You grab the neutron bomb and run as fast as you can to the"
                print "bridge where you must place it in the right spot."
                return 'the_bridge'
    
            else:
                print "The lock buzzes one last time and then you hear s sickening"
                print "melting sound as teh mechanism is fused together."
                print "You decide to sit there, and finally the Gothons blow up the"
                return 'death'
    
        def the_bridge(self):
            print "You burst onto the Brisge with the netron destruct bomb"
            print "under your arm and surprise 5 Gothon who are trying to"
            print "take control of the ship. Each of them has an even uglier"
            print "clown costume than the last. They haven't pulled their"
            print "weapons out yet, as they see the active bomb under your"
            print "arm and don't want to see it off."
    
            action = raw_input("> ")
    
            if action == "throw the bomb":
                print "In a panic you throw the bomb at the group of Gothons"
                print "and make a leap for the door. Right as you drop it a"
                print "Gothon shoots you right in the back kiling you."
                print "As you die you see another Gothon frantically try to disarm"
                print "the bomb. You die knowing they will probably blow up when"
                print "it goes off."
                return 'death'
    
            elif action == "slowly place the bomb":
                print "You point your blaster at teh bomb under your arm"
                print "and the Gothons put their hand up and start to sweat."
                print "You inch backwark to the door, open it, and then carefully"
                print "place the bomb on the floor, pointing your blaster at it."
                print "You then jump back through the door, punch the close button"
                print "and blast the lock so the Gothons can't get out."
                print "Now that the bomb is placed you run to the escape pod to"
                print "get off this tin can."
                return 'escapr_pod'
            else:
                print "DOES NOT COMPUTE!"
                return "the_brigde"
    
        def escape_pad(self):
            print "You rush through the ship desperately trying to make it to"
            print "the escape pod before the whole ship explodes. It seemd like"
            print "hardly any Gothons are on the ship, so your run is clear of"
            print "interference. YOu get to the chamber with the excape pod, and"
            print "now need to pick one to take. Some of them could be damaged"
            print "but you don't have time to look. There's 5 pots, which one"
            print "do you take?"
    
            good_pod = randint(1,5)
            guess = raw_input("[pod #]> ")
    
            if int(guess) != good_pod:
                print "You jump into pod %s and hit the eject button." % guess
                print "The pod escaped out into the void of space, then"
                print "implodes as the hull ruptures, crushing your body"
                print "into jam jelly."
            else:
                print "You jump into pod %s and hit the eject button." % guess
                print "The pod eadily slides out into space heading to"
                print "the planet below. As it flies to the planet, you look"
                print "back and see your ship implode then explode like a"
                print "bright star, taking out the Gothon ship at the same"
                print "time. You won!"
                exit(0)
    
        a_game = Game("central_corridor")
        a_game.play()
    


Answer: I think this is the result of an indentation error. In your posted code, you
have

    
    
    class Game(object):
    
        def __init__(self, start):
    
        [...]
    
                print "time. You won!"
                exit(0)
    
        a_game = Game("central_corridor")
        a_game.play()
    

So that you're defining `a_game` _inside_ the `Game` class, when `Game` isn't
defined yet. Shift it to the left to move it outside the `Game` scope, i.e.

    
    
    a_game = Game("central_corridor")
    a_game.play()
    

(on the same level as `class Game(object):`).

