一、作业内容：习题42-45
二、模块、类、对象三种概念一定要弄清楚。模块（module）与字典相似,模组是包含函数和变量的.py文件，可以调用（import）这个文件,然后使用
‘.’操作符访问到模组中的函数和变量
习题42

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."]
        self.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(self.quips)-1)])
        exit(1)


    def central_corridor(self):
        print("The Gothons of Planet Percel # 25have 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 destruct bomb from the Weapons Armory,")
        print("put it in the bridge, and blow the ship up after getting into an")
        print("escape pod.")
        print("\n")
        print("You're running down the central corridor to the Weapon 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 the")
        print("Armory and about to pull a weapon to blast you.")

        action = input(">")

        if action == "shoot!":
            print("Quick on the draw you yank out your blaster and fire it at the Gothon.")
            print("His clown costume is flowing and moving around his body, which throws")
            print("off your aim. Your laster hits his costume but misses him entirely. This")
            print("completely ruins his brand new costume 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 laster past your head.")
            print("In the middle of your artful dodge your foot slips and you")
            print("bang your head on the metal wall and pass out.")
            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 Gothon insults in the academy.")
            print("You tell the one Gothon joke you know:")
            print("Lbhe zbgure vf fb sng, jura fur fvgf nebhaq gur ubhfr, fur fvgf nebhaq gur ubhfr.")
            print("The Gothon stops, tries not to laugh, then busts out laughing and can't move.")
            print("While he's laughing you run up and shoot him square in the head")
            print("The Gothon stops, tries not to laugh, then busts out laughing and can't move.")
            print("While he's laughing you run up and shoot him square in the head")
            print("putting him down, then jump through the Weapon Armory door.")
            return('laser_weapon_armory')

        else:
            print("DOES NOT COMPUTER!")
            return('central_corridor')

    def laser_weapon_armory(self):
        print("You do a dive roll into the Weapon Armory, crouch and scan the room")
        print("for more Gothons 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 box")
        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=input("[keypad]>")
        guesses=0
        while guess != code and guesses <10:
            print("BZZZZEDDD!")
            guesses+=1
            guess=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 a sickening")
            print("melting sound as the mechanism is fused together.")
            print("You decide to sit there, and finally the Gothons blow up the")
            print("ship from their ship and you die.")
            return('death')

    def the_bridge(self):
        print("Your burst onto the Bridge with the neutron destruct bomb")
        print("under your arm and surprise 5 Gothons 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("weapon out yet, as they see the active bomb under your")
        print("arm and don't want to set it off.")
        action=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 killing 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 the bomb under your arm")
            print("and the Gothons put their hands up and start to sweat.")
            print("You inch backward 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('escape_pod')
        else:
            print("DOES NOT COMPUTE!")
            return("the_bridge")

    def escape_pod(self):
        print("You rush through the ship desperately trying to make it to")
        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 pods, which one")
        print("do you take?")
        good_pod=randint(1,5)
        guess=input("[pod #]> ")


        if int(guess) != good_pod:
            print("You jump into pod %s and hit the eject button." % guess)
            print("The pod escapes out into the void of space, then")
            print("implodes as the hull ruptures, crushing your body")
            print("into jam jelly.")
            return('death')
        else:
            print("you jump into pod %s and hit the eject button." % guess)
            print("The pod easily 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()

结果：

C:\ProgramData\Anaconda3\python.exe E:/pyproject/ex42.py

--------
The Gothons of Planet Percel # 25have invaded your ship and destroyed
your entire crew. You are the last surviving member and your last
mission is to get the neutron destruct bomb from the Weapons Armory,
put it in the bridge, and blow the ship up after getting into an
escape pod.


You're running down the central corridor to the Weapon Armory when
 a Gothon jumps out, red scaly skin, dark grimy teeth, and evil clown costume
flowing around his hate filled body. He's blocking the door to the
Armory and about to pull a weapon to blast you.
>bidage
DOES NOT COMPUTER!

--------
The Gothons of Planet Percel # 25have invaded your ship and destroyed
your entire crew. You are the last surviving member and your last
mission is to get the neutron destruct bomb from the Weapons Armory,
put it in the bridge, and blow the ship up after getting into an
escape pod.


You're running down the central corridor to the Weapon Armory when
 a Gothon jumps out, red scaly skin, dark grimy teeth, and evil clown costume
flowing around his hate filled body. He's blocking the door to the
Armory and about to pull a weapon to blast you.
>escape_pod
DOES NOT COMPUTER!

--------
The Gothons of Planet Percel # 25have invaded your ship and destroyed
your entire crew. You are the last surviving member and your last
mission is to get the neutron destruct bomb from the Weapons Armory,
put it in the bridge, and blow the ship up after getting into an
escape pod.


You're running down the central corridor to the Weapon Armory when
 a Gothon jumps out, red scaly skin, dark grimy teeth, and evil clown costume
flowing around his hate filled body. He's blocking the door to the
Armory and about to pull a weapon to blast you.
>pod
DOES NOT COMPUTER!

--------
The Gothons of Planet Percel # 25have invaded your ship and destroyed
your entire crew. You are the last surviving member and your last
mission is to get the neutron destruct bomb from the Weapons Armory,
put it in the bridge, and blow the ship up after getting into an
escape pod.


You're running down the central corridor to the Weapon Armory when
 a Gothon jumps out, red scaly skin, dark grimy teeth, and evil clown costume
flowing around his hate filled body. He's blocking the door to the
Armory and about to pull a weapon to blast you.
>good_pop
DOES NOT COMPUTER!

--------
The Gothons of Planet Percel # 25have invaded your ship and destroyed
your entire crew. You are the last surviving member and your last
mission is to get the neutron destruct bomb from the Weapons Armory,
put it in the bridge, and blow the ship up after getting into an
escape pod.


You're running down the central corridor to the Weapon Armory when
 a Gothon jumps out, red scaly skin, dark grimy teeth, and evil clown costume
flowing around his hate filled body. He's blocking the door to the
Armory and about to pull a weapon to blast you.
>dodge
DOES NOT COMPUTER!

--------
The Gothons of Planet Percel # 25have invaded your ship and destroyed
your entire crew. You are the last surviving member and your last
mission is to get the neutron destruct bomb from the Weapons Armory,
put it in the bridge, and blow the ship up after getting into an
escape pod.


You're running down the central corridor to the Weapon Armory when
 a Gothon jumps out, red scaly skin, dark grimy teeth, and evil clown costume
flowing around his hate filled body. He's blocking the door to the
Armory and about to pull a weapon to blast you.
>tell a joke
Lucky for you they made you learn Gothon insults in the academy.
You tell the one Gothon joke you know:
Lbhe zbgure vf fb sng, jura fur fvgf nebhaq gur ubhfr, fur fvgf nebhaq gur ubhfr.
The Gothon stops, tries not to laugh, then busts out laughing and can't move.
While he's laughing you run up and shoot him square in the head
The Gothon stops, tries not to laugh, then busts out laughing and can't move.
While he's laughing you run up and shoot him square in the head
putting him down, then jump through the Weapon Armory door.

--------
You do a dive roll into the Weapon Armory, crouch and scan the room
for more Gothons that might be hiding. It's dead quiet, too quiet.
You stand up and run to the far side of the room and find the
neutron bomb in its container. There's a keypad lock on the box
and you need the code to get the bomb out. If you get the code
wrong 10 times then the lock closes forever and you can't
get the bomb. The code is 3 digits.
[keypad]>123
BZZZZEDDD!
[keypad]>456
BZZZZEDDD!
[keypad]>789
BZZZZEDDD!
[keypad]>678
BZZZZEDDD!
[keypad]>263
BZZZZEDDD!
[keypad]>746
BZZZZEDDD!
[keypad]>999
BZZZZEDDD!
[keypad]>178
BZZZZEDDD!
[keypad]>567
BZZZZEDDD!
[keypad]>879
BZZZZEDDD!
[keypad]>888
The lock buzzes one last time and then you hear a sickening
melting sound as the mechanism is fused together.
You decide to sit there, and finally the Gothons blow up the
ship from their ship and you die.

--------
Nice job, you died ... jackass.

Process finished with exit code 1

注意：模块，相当于一种特殊字典的作用，通过这种方式存储python代码，通过‘.’操作符访问到这些代码；类，相当于把一组函数和数据放到一个容器中，从而用‘.’操作符访问到它们。类的好处在于可重复创建出好多来，它们也不会相互干涉，而模块当你import之后，整个程序里就只有这一份内容。其中类要实例（instance）化，就是创建的意思，当创建后便可以得到一个对象（object）.