习题 41: 来自 Percal 25 号行星的哥顿人 (Gothons)
在文本编辑器中，编辑以下内容并保存到ex41.py文件中，同时在终端中运行该文件：
from sys import exit
from random import randint
def death():
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."]
print quips[randint(0,len(quips)-1)]
exit(1)
def central_corridor():
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 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 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 the"
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 Gothon."
print "His clown costume is flowing and moving around his body, which throws"
print "off your aim. Your laser 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 laser 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 "putting him down, then jump through the Weapon Armory door."
return 'laser_weapon_armory'
else:
print "DOES NOT COMPUTE!"
return 'central_corridor'
def laser_weapon_armory():
print "You do a dive roll into the Weapon Armory, crouch and scan the room"
print "for more Gothons that might behiding. 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))
print "code:", code
guess = raw_input("[keypad]>")
guesses = 0
while guess != code and guesses < 10:
print "BZZZZZEDDD!"
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 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():
print "You burst onto the Bridge with the neutron destructbomb"
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 "weapons out yet, as they see the active bomb under your"
print "arm and don't want to set 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 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 to sweat."
print "and the Gothons put their hands up and start"
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():
print "You rush through the ship desperately trying to make it to"
print "the escape pod before the whole ship explodes. It seems like"
print "hardly any Gothons are on the ship, so your run is clear of"
print "interference. You get to the chamber with the escape pods, 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 pods, 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 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)
ROOMs = {
'death': death,
'central_corridor': central_corridor,
'laser_weapon_armory': laser_weapon_armory,
'the_bridge': the_bridge,
'escape_pod': escape_pod
}
def runner(map, start):
next = start
while True:
room = map[next]
print "\n-----------"
next = room()
runner(ROOMs,'central_corridor')
执行结果：
$ python ex41.py
-----------
The Gothons of Planet Percal #25 have 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 Weapons 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
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 behiding. 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.
code: 934
[keypad]>266
BZZZZZEDDD!
[keypad]>934
The container clicks open and the seal breaks, letting gas out.
You grab the neutron bomb and run as fast as you can to the
bridge where you must place it in the right spot.
-----------
You burst onto the Bridge with the neutron destructbomb
under your arm and surprise 5 Gothons who are trying to
take control of the ship. Each of them has an even uglier
clown costume than the last. They haven't pulled their
weapons out yet, as they see the active bomb under your
arm and don't want to set it off.
>slowly place the bomb
You point your blaster at the bomb under your arm to sweat.
and the Gothons put their hands up and start
You inch backward to the door, open it, and then carefully
place the bomb on the floor, pointing your blaster at it.
You then jump back through the door, punch the close button
and blast the lock so the Gothons can't get out.
Now that the bomb is placed you run to the escape pod to
get off this tin can.
-----------
You rush through the ship desperately trying to make it to
the escape pod before the whole ship explodes. It seems like
hardly any Gothons are on the ship, so your run is clear of
interference. You get to the chamber with the escape pods, and
now need to pick one to take. Some of them could be damaged
but you don't have time to look. There's 5 pods, which one
do you take?
[pod #]>2
You jump into pod 2 and hit the eject button.
The pod escapes out into the void of space, then
implodes as the hull ruptures, crushing your body
into jam jelly.
-----------
Such a luser.
加分习题
- 解释一下返回至下一个房间的工作原理。
词典ROOMS中的值存储的是每个函数的名字，通过键来找到对应的函数名字，例如room = map[next]，通过room（）来调用对应的函数，函数的返回值再回传给next，如：next = room()；通过next的值再从字典中找到对应的函数名称。 - 创建更多的房间，让游戏规模变大。
- 除了让每个函数打印自己以外，再学习一下“文档字符串(doc strings)”式的注解。看看你能不能将房间描述写成文档注解，然后修改运行它的代码，让它把文档注解打印出来。
文档字符串的惯例是一个多行字符串，它的首行以大写字母开始，句号结尾。第二行是[空行]，从第三行开始是详细的描述。可以使用doc（注意双下划线）调用函数的文档字符串属性
''' This is doc strings style:
The Gothons of Planet Percal #25 have 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 Weapons 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.
'''
print "central_corridor.__doc__ :",central_corridor.__doc__
执行结果：
$ python ex41.py
-----------
central_corridor.__doc__ : This is doc strings style:
The Gothons of Planet Percal #25 have 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 Weapons 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.
- 一旦你用了文档注解作为房间描述，你还需要让这个函数打印出用户提示吗?试着让运行函数的代码打出用户提示来，然后将用户输入传递到各个函数。你的函数应该只是一些 if 语句组合，将结果打印出来，并且返回下一个房间。
- 这其实是一个小版本的“有限状态机(finite state machine)”，找资料阅读了解一下，虽然你可能看不懂，但还是找来看看吧。
