20170928习题

Posted 2020-10-08

ex36

#分支和函数
from sys import exit        #导入system模块中的exit函数

def gold_room():            #定义金子房间的函数
    print("this room is full of gold,how much do you take?")
    next = input(">")       #输入内容

    # if "0" in next or "1" in next:
    #     how_much = int(next)

    if int(next) >= 0:      #改进后判断输入是否为数值
        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():        #定义熊房间的函数
    print("this 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 money":
            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 chew your leg off.")
        elif next =="open the door" and bear_moved:
            gold_room()
        else:
            print("i got no idea what the means.")
def cthulhu_room():         #定义恶魔房间的函数
    print("here you see the great evil leftcthulhu.")
    print("he,it,whatever stares at you and you go insane.")
    print("do you flee for your life or eat your life.")

    next = input(">")
    if "flee" in next:
        start()
    elif "head" in next:
        dead("well that was tasty.")
    else:
        cthulhu_room()
def dead(why):              #定义死亡的函数
    print(why,"good job.")
    exit(0)

def start():                #定义开始的函数
    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()
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ex.39

#列表的操作

ten_things = "apples oranges crows telephone light sugar"
print("wait,there is not 10 things in that list,let‘s fix it.")

stuff = ten_things.split(" ")       #split为切割列表指定内容
more_stuff = ["day","night","song","frisbee","corn","banana","girl","boy"]

while len(stuff) != 10:             #len为计算列表内容的长度
    next_one = more_stuff.pop()     #pop为取得列表内某一内容，不指定参数时，默认取得最后一个
    print("adding",next_one)
    stuff.append(next_one)          #append为列表内增加指定内容
    print("there is %d items now" %len(stuff))

print("there we go:",stuff)
print("let‘s do something with stuff.")

print(stuff[1])                     #stuff[1]为列表内索引值为1的内容
print(stuff[-1])                    #stuff[-1]为列表内索引值为-1的内容，就是从尾部数第一的
print(stuff.pop())
print(‘ ‘.join(stuff))
print(‘#‘.join(stuff[3:5]))         #join向列表内指定位置增加指定内容
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ex40

#字典、可爱的字典

cities = {‘ca‘:‘san francisco‘,‘mi‘:‘detroit‘,‘fl‘:‘jacksonville‘}
cities[‘ny‘] = ‘new york‘
cities[‘or‘] = ‘portland‘

def find_city(themap,state):                #定义一个函数，参数是themap和state
    if state in themap:                     #判断，如果state在themap里，返回一个themap值
        return themap[state]
    else :                                  #否则，返回没找到
        return "not found"
#ok,pay attention!
cities[‘_find‘] = find_city                 #向字典内增加一个键值对，键是_find，值是[find_city]函数
while True:
    print("state?(enter to quit)")
    state = input(‘>‘)
    if not state :break
    #this line is the most important ever!study!
    city_found = cities[‘_find‘](cities,state)  #调用函数，find_city(cities,state)，返回states对应的city，赋值给变量
    print(city_found)
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2017-09-28    22:38:30