20170928习题

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()-----------------------------------------------------------------------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------------------------------------------------------------------------------------------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)---------------------------------------------------------------------------------------------------------------------2017-09-28    22:38:30