笨办法学Python（learn python the hard way）--练习程序31-35

下面是练习31-练习35，基于python3

 #ex31.py
 1 print("You enter a dark room witn two doors.  Do you go through door #1 or door #2?")


door = input("> ")

if door == "1":
    print("There's a giant bear here eating a cheese cake.  What do you do?")
    print("1. Take the cake.")
    print("2. Scream at the bear.")
    
    bear = input("> ")
    
    if bear == "1":
        print("The bear eats your face off.  Good job!")
    elif bear == "2":
        print("The bear eats your legs off.  Good job!")
    else:
        print("Well, doing %s is probably better.  Bear runs away." %bear)

        
elif door == "2":
    print("You stare into the endless abyss at Cthulhu's retina.")
    print("1. Blueberries.")
    print("2. Yellow jacket clothespins.")
    print("3. Understanding revolvers yelling melodies.")
    
    insanity = input("> ")
    
    if insanity == "1" or insanity == "2":
        print("Your body survives powered by a mind of jello.  Good job!")
    else:
        print("The insanity rots your eyes into a pool of muck.  Good job!")
        
else:
    print("You stumble around and fall on a knife and die.  Good job!")

 #ex32.py
 1 the_count = [1, 2, 3, 4, 5]
fruits = ['apples', 'oranges', 'pears', 'apricots']
change = [1, 'pennies', 2, 'dimes', 3, 'quarters']

# this first kind of for-loop goes through a list
for number in the_count:
    print("This is count %d" % number)
    
# same as above
for fruit in fruits:
    print("A ftuit of type: %s" % fruit)
    
# also we can go through mixed lists too
# notice we have to use %r since we don't know what's in it
for i in change:
    print("I got %r" % i)
    
# we can also build lists, first start with an empty one
#elements = []

elements = range(0, 6)
# then use the range function to do 0 to 5 counts
#for i in range(0, 6):
   # print("Adding %d to the list." % i)
    # append is a function that lists understand
  #  elements.append(i)
    
# now we can print them out too
for i in elements:
    print("Element was: %d" % i)

 #ex33.py
 1 i = 0
numbers = []

while i < 6:
    print("At the top i is %d" % i)
    numbers.append(i)
    
    i = i + 1
    print("Numbers now: ", numbers)
    print("At the bottom i is %d" % i)
    
    
print("The numbers: ")

for num in numbers:
    print(num)

 #ex33+.py
 1 # 加分习题
#函数里边的变量和脚本里边的变量之间是没有连接的
#所以定义函数必须返回numbers变量并重新给numbers赋值
def numbers_append(j,k):  
    i = 0
    numbers = []
    while i < j:
        print("At the top i is %d" % i)
        numbers.append(i)
    
        i = i + k
        print("Numbers now: ", numbers)
        print("At the bottom i is %d" % i)
    return numbers
    
    
numbers = numbers_append(6, 1)

print("The numbers: ")

for num in numbers:
    print(num)

#ex34.py
1 animals = ['bear', 'tiger', 'penguin', 'zebra']
bear = animals[1]
print(bear)

 #ex35.py
 1 #sys.exit() 引发一个 SystemExit异常，若没有捕获这个异常，Python解释器会直接退出；捕获这个异常可以做一些额外的清理工作。0为正常退出，其他数值（1-127）为不正常，可抛异常事件供捕获。
from sys import exit

def gold_room():
    print("This room is full of gold.  How much do you take?")
    
    next = input("> ")
    if "0" in next or "1" in next:
        how_much = int(next)
    else:
        dead("Man, learn to type a number.")
        
    if how_much < 50:
        print("Nice, you're not greedy, you win!")
        exit(0)
    else:
        dead("You greedy bastard!")
        
        
def bear_room():
    print("There is a bear here.")
    print("The bear has a bunch of honey.")
    print("The fat bear is in front of another door.")
    print("How are you going to move the bear?")
    bear_moved = False
    while True:
        next = input("> ")
        
        if next == "take honey":
            dead("The bear looks at you then slaps your face off.")
            
        elif next == "taunt bear" and not bear_moved:
            print("The bear has moved from the door.  You can go through it now.")
            bear_moved = True
            
        elif next == "taunt bear" and bear_moved:
            dead("The bear gets pissed off and chews your leg off.")
            
        elif next == "open door" and bear_moved:
            gold_room()
            
        else:
            print("I got no idea what that means.")
           
            
            
def cthulhu_room():
    print("Here you see the great evil Cthulhu.")
    print("He, it, whatever stares at you and you go insane.")
    print("Do you flee for your life or eat your head?")
    
    next = input("> ")
    
    if "flee" in next:
        start()
    elif "head" in next:
        dead("Well that was tasty!")
    else:
        cthulhu_room()
        
        
def dead(why):
    print(why, "Good job!")
    exit(0)
    
def start():
    print("You are in a dark room.")
    print("There is a door to your right and left.")
    print("Which one do you take?")
    
    next = input("> ")
    
    if next == "left":
        bear_room()
    elif next == "right":
        cthulhu_room()
    else:
        dead("You stumble around the room until you starve.")
        
        
start()