《Python编程：从入门到实践》答案

川长思鸟来 2023-02-21 11:48 17阅读 0赞

> ***快乐又不要钱，为什么不呢？***

【注】本文中所有的代码本人全部测试通过后才写在下面。考虑到夹杂结果图片太乱，所以没加。大家复制代码拿去运行即可。

前面章节的答案后续会补上。

【注】所有包含中文的代码都必须把编码设置成UTF-8才能正常运行。我用的是Geany，设置方法为：文档——设置文件编码——Unicode-——UTF-8

持续更新……

# 第二章 #

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3NodXl1ZGV4aWFvd3U_size_16_color_FFFFFF_t_70][]

print("Hello my new life,\nhllo ,the technology world.\nplese be gentle to me.")

2-2

message="Hello my new life,\nhllo ,the technology world.\nplese be gentle to me."
    print(message)

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3NodXl1ZGV4aWFvd3U_size_16_color_FFFFFF_t_70 1][] 2-3

name = 'Eric'
    print('Hello '+name+', would you like to learn some pyghon today?')

2-4

name = 'eric'
    print(name.title())
    print(name.upper())
    print(name.lower())

--------------------

name = 'albert einstein'
    saying="A person who never made a mistake never tried anything new."
    print(name.title()+"once said"+": "+'\n\t"'+saying+'"')

![20200905171002347.png][]

name = ' albert einstein '
    saying="A person who never made a mistake never tried anything new."
    print(name.title())
    print(name.title().lstrip().rstrip()+"once said"+": "+'\n\t"'+saying+'"')
    print(name.strip())

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3NodXl1ZGV4aWFvd3U_size_16_color_FFFFFF_t_70 2][]

print(80/10)
    print(2*4)
    print(10-2)

number=4
    print("my favorite number is "+str(number))

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3NodXl1ZGV4aWFvd3U_size_16_color_FFFFFF_t_70 3][]

# 第三章 #

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3NodXl1ZGV4aWFvd3U_size_16_color_FFFFFF_t_70 4][]

names=['王辰','王杰','许博文','肖嘉良','田家铭','徐汉章']
    for name in names:
    	print(name)

names=['王辰','王杰','许博文','肖嘉良','田家铭','徐汉章']
    for name in names:
    	print('Hello '+name+" it's good to see you !")

names=['car','bicycle','shared bikes','motorcycle','bus']
    for name in names:
    	print('To be the truth ,my favorite vehicle is '+name+'.')

![2020090609562849.png][]

names=['泽东','和珅','胡雪岩','华罗庚','王羲之']
    for name in names:
    	print('Dear '+name+' ,i respectfully invite you to join me for dinner.')

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3NodXl1ZGV4aWFvd3U_size_16_color_FFFFFF_t_70 5][]

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3NodXl1ZGV4aWFvd3U_size_16_color_FFFFFF_t_70 6][]

![20200906110911290.png][]

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3NodXl1ZGV4aWFvd3U_size_16_color_FFFFFF_t_70 7][]

names=['泽东','和珅','胡雪岩','华罗庚','王羲之']
    for name in names:
    	print('Dear '+name+' ,i respectfully invite you to join me for dinner.')
    
    print('\n\nSorry the '+names[-2]+' has no time these days ,please call someone else.')
    names[-2]='张三丰'
    print(names)
    
    for name in names:
    	print('Dear '+name+' ,i respectfully invite you to join me for dinner.')
    
    print('My lovely friends ,i have find a bigger desk and now we can invite more friends')
    print(names)
    print('\n')
    names.append('老子')
    names.insert(0,'水阡陌')
    for name in names:
    	print('Dear '+name+' ,i respectfully invite you to join me for dinner.')
    
    print(names)
    print('Oh my God ,now i have to pick two of you \n')
    for index in range(2,len(names)):
    	pop_name=names.pop()
    	print("sorry "+pop_name+" i can't help it ,because the book says.")
    for name in names:
    	print('Dear '+name+ ' everything went according to plan.')
    del names[-1]
    del names[0]
    print(names)

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3NodXl1ZGV4aWFvd3U_size_16_color_FFFFFF_t_70 8][]

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3NodXl1ZGV4aWFvd3U_size_16_color_FFFFFF_t_70 9][]

tourist_attractions=['shenzhen','guangzhou','shanghai','jinlinqu']
    print(tourist_attractions)
    print(sorted(tourist_attractions))
    print(tourist_attractions)
    print(sorted(tourist_attractions,reverse=True))
    print(tourist_attractions)
    tourist_attractions.reverse()
    print(tourist_attractions)
    tourist_attractions.reverse()
    print(tourist_attractions)
    tourist_attractions.sort()
    print(tourist_attractions)
    tourist_attractions.sort(reverse=True)
    print(tourist_attractions)

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3NodXl1ZGV4aWFvd3U_size_16_color_FFFFFF_t_70 10][]

names=['毛泽东','和珅','胡雪岩','华罗庚','王羲之']
    for name in names:
    	print('Dear '+name+' ,i respectfully invite you to join me for dinner.')
    
    print('\n\nSorry the '+names[-2]+' has no time these days ,please call someone else.')
    names[-2]='张三丰'
    print(names)
    print(len(names))

# 第四章 #

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3NodXl1ZGV4aWFvd3U_size_16_color_FFFFFF_t_70 11][]

pizzas=['zebra','peacock','panda']
    for pizza in pizzas:
    	print('My favorite pizza is '+pizza+'.')
    print('I really like pizza.')

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3NodXl1ZGV4aWFvd3U_size_16_color_FFFFFF_t_70 12][]

animals=['zebra','peacock','panda']
    for animal in animals:
    	print(animal+' in China is the protected-animals.')
    print('They are the part of this world ,in other words ,it is our friends.')

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3NodXl1ZGV4aWFvd3U_size_16_color_FFFFFF_t_70 13][]

#4-3
    for number in range(1,21):
    	print(number)
    print('\n'+'=====================')
    
    #4-4
    #for num in range(1,1000001):
    #	print(num)
    #4-5
    number=list(range(1,1000001))
    print(min(number))
    print(max(number))
    print(sum(number))
    print('\n'+'=====================')
    
    #4-6
    odds=list(range(1,21,2))
    for odd in odds:
    	print(odd)
    print('\n'+'=====================')
    #4-7
    three_multiple=[num*3 for num in range(1,31)]
    for number in three_multiple:
    	print(number)
    print('\n'+'=====================')
    #4-8
    cubes=[num**3 for num in range(1,11)]
    for cube in cubes:
    	print(cube)
    print('\n'+'=====================')
    #4-9同4-8

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3NodXl1ZGV4aWFvd3U_size_16_color_FFFFFF_t_70 14][]

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3NodXl1ZGV4aWFvd3U_size_16_color_FFFFFF_t_70 15][]

pizzas=['zebra','peacock','panda','shark','dolphin','eagle']
    print('The first three items in this list is: ')
    print(pizzas[:3])
    print('The items from the middle of list is: ')
    print(pizzas[1:4])
    print('The last three items in this list is: ')
    print(pizzas[-3:])
    #4-10
    friend_pizzas=pizzas[:]
    friend_pizzas.append('bear')
    print("My favorite pizza is:\n")
    for pizza in pizzas:
    	print(pizza)
    print('++++++++++++++')
    print("My friend favorite pizza is :\n")
    for pizza in friend_pizzas:
    	print(pizza)

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3NodXl1ZGV4aWFvd3U_size_16_color_FFFFFF_t_70 16][]

foods=('steamed stuffed bun','steamed bun','dumplings','congee','rice')
    for food in foods:
    	print(food)
    print('\n')
    #foods[0]='rice'
    foods=('noodle','hot pot','dumplings','congee','rice')
    for food in foods:
    	print(food)

# 第五章 #

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3NodXl1ZGV4aWFvd3U_size_16_color_FFFFFF_t_70 17][]

car='subaru'
    print("Is car=='subaru'? I predict True.")
    print(car=='subaru')
    
    print("\nIs car =='audi'? Ipredict False.")
    print(car=='audi')
    
    animal='peacock'
    print(animal=='zebra')

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3NodXl1ZGV4aWFvd3U_size_16_color_FFFFFF_t_70 18][]

yesterday_you_said="you are my only lover forever."
    Today_you_say="you can't control who I really love."
    print(yesterday_you_said==Today_you_say)
    print('\n')
    your_dream="Success"
    situation="success"
    print(your_dream.lower()==situation)
    print(34<=4)
    if 34<45 and 100*2<=400:
    	print("the computer is better than child.")
    new_words=['peacock','cube','eagle']
    if 'peacock' in new_words:
    	print("you can figure it!")
    if 'bear' not in new_words:
    	print("take care yur eyes!")

![20200907143552237.png][]

![20200907143611364.png][]

alien_color='green'
    if alien_color=='green':
    	print("you get 5 points")
    
    alien_color='red'
    if alien_color=='green':
    	print("you get 5 points")

![20200907143859899.png][]

alien_color='red'
    if alien_color=='green':
    	print("you get 5 points")
    else:
    	print("you get 10 points")

![20200907144433386.png][]

alien_color='green'
    if alien_color=='greaen':
    	print("you get 5 points")
    elif alien_color=='red':
    	print("you get 10 points")
    else :
    	print("you get 15 points")

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3NodXl1ZGV4aWFvd3U_size_16_color_FFFFFF_t_70 19][]

age=23
    if age<2:
    	print("U are an infant.")
    elif age<4:
    	print("U are a baby")
    elif age<13:
    	print("U are a child.")
    elif age<20:
    	print("U are a youngth.")
    elif age<65:
    	print("U are an adult.")
    else :
    	print("U are an elder.")

![20200907144958751.png][]

fruit=['orange','apple','graph','banana']
    if 'apple' in fruit:
    	print("you like apple.")
    if 'graph' in fruit:
    	print("you like graph.")
    if 'watermellion' not in fruit:
    	print('you do not like watermallion')

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3NodXl1ZGV4aWFvd3U_size_16_color_FFFFFF_t_70 20][]

guests=['admin','A','W','L','Z']
    for guest in guests:
    	if guest=='admin' :
    		print("love you my admin~~")
    	else :
    		print("welcome home "+guest +".")

![20200630122155206.png][]

guests=[]
    
    if guests:
    	for guest in guests:
    		if guest=='admin' :
    			print("love you my admin~~")
    		else :
    			print("welcome home "+guest +".")
    else:
    	print("We need to find some users!")

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3NodXl1ZGV4aWFvd3U_size_16_color_FFFFFF_t_70 21][]

current_users=['A','B','C','D','E']
    new_users=['A','B','X','Y','S']
    for new_user in new_users:
    	if new_user in current_users:
    		print('Sorry ,you need to change your name!')
    	else:
    		print('This name has never been used!')

![20200630124917599.png][]

【做这一问时遇到了问题，我先把正解写在下面再把我错误那个 拿出来分析】

#这是正解 
    current_users=['A','B','C','D','E']
    curren_users=[x.swapcase() for x in current_users]
    
    new_users=['A','B','X','S','Y']
    
    for user in new_users:
        if user.lower() in current_users:
            print('Sorry ,this name has been used ')
        else :
            print('Ok ,you have a new name')

#这是有问题的代码 
    
    current_users=['A','B','C','D','E']
    #我主要错在这个for 循环，我想把列表中所有元素变小写。
    for current_user in current_users:
    	store=current_user.lower()
    	current_users.append(store)
    	current_users.remove(store)
    	
    print(current_users)
    
    new_users=['a','B','X','Y','S']
    for user in new_users:
    	if user.lower() in current_users:
    		print('Sorry ,you need to change your name!')
    	else:
    		print('This name has never been used!')
    
    错误分析：
    就是，for 循环是始终按索引+1去遍历，在删除了第一个元素之后，我想要遍历的第二个元素变成了第一个元素，
    但此时for 循环认为已经遍历完了第一个，开始遍历第二个。此时的第二个就是没删除元素时的第三个元素。所以我看到的是跳了一个的结果

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3NodXl1ZGV4aWFvd3U_size_16_color_FFFFFF_t_70 22][]

nums=[1,2,3,4,5,6,7,8,9]
    for num in nums:
    	if num==1:
    		print(str(num)+'st')
    	elif num==2:
    		print(str(num)+'nd')
    	elif num==3:
    		print(str(num)+'rd')
    	else:
    		print(str(num)+'th')

#  **第六章** #

![20200711102823296.png][]

acquaintance={
    	'first_name':'zhang',
    	'last_name':'shuyu',
    	'city':'heilongjiang',
    	}
    print(acquaintance['first_name'])
    print(acquaintance['last_name'])
    print(acquaintance['city'])

![20200711103111389.png][]

favorate_num={
    	'me':'2',
    	'she':'3',
    	'he':'8',
    	}
    print(favorate_num['she'])

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3NodXl1ZGV4aWFvd3U_size_16_color_FFFFFF_t_70 23][]

words={
    	'str':'change the number to string',
    	'list':'to form a list',
    	'lstrip':'delete the left blank in the string',
    	'range':'to form a series of number between '+
    	'the first number and the end number',
    	'swapcase':'change the upper to lower or reverse',
    	}
    print('str'+': '+words['str']+'\n')
    print('list'+': '+words['list']+'\n')
    print('lstrip'+': '+words['lstrip']+'\n')
    print('range'+': '+words['range']+'\n')
    print('swapcase'+': ' +words['swapcase']+'\n')

![20200711155032609.png][]

rivers={
    	'Rhine':'Switzerland',
    	'changJiang':'china',
    	'nile':'egypt',
    	}
    for river,country in rivers.items():
    	print('The '+river.title()+'runs through the '+country.title()+'.')
    
    #这道题需要注意的地方是 for 循环的用法，其中，rivers.items()不要忘了items()

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3NodXl1ZGV4aWFvd3U_size_16_color_FFFFFF_t_70 24][]

favorate_languages={
    	'A':'english',
    	'C':'chinese',
    	'D':'python',
    	'X':'ahahha',
    	}
    inquiry_list=['A','C','D','W']
    for name in inquiry_list:
    	if name in favorate_languages.keys():
    		print('you need to have a life you like and meet the lover one for you')
    	else:
    		print('if there is a mess, change it')

![202007121141220.png][]

acquaintance_1={
    	'first_name':'zhang',
    	'last_name':'shuyu',
    	'city':'heilongjiang',
    	}
    acquaintance_1={
    	'first_name':'zhang',
    	'last_name':'shuyu',
    	'city':'heilongjiang',
    	}
    acquaintance_2={
    	'first_name':'liu',
    	'last_name':'fang',
    	'city':'dalian',
    	}
    acquaintance_3={
    	'first_name':'cui',
    	'last_name':'shijie',
    	'city':'hubei',
    	}
    people=[acquaintance_1,acquaintance_2,acquaintance_3]
    for person in people:
    	print(person)

![20200712114236101.png][]

cat={
    	'category':'bosi',
    	'lord':'fangfang'
    	}
    dog={
    	'category':'dubin',
    	'lord':'haha',
    	}
    rabbit={
    	'category':'white',
    	'lord':'dadada'
    	}
    pets=[cat,dog,rabbit]
    for pet in pets:
    	print(pet)

![20200712123241873.png][]

favorate_places={
    	'me':['changjiang','huanghe','shaolinsi'],
    	'she':['harBin','jilin','nanjing'],
    	'he':['beside his home a yard']
    	}
    for man,places in favorate_places.items():
    	print(man+': ')
    	for place in places:
    		print(place)
    	print('\n')

![20200712123908817.png][]

favorate_num={
    	'me':['2','5','8'],
    	'she':['3','6','9'],
    	'he':['7','4','1'],
    	}
    for name,number in favorate_num.items():
    	print(name+'\'s favorate number are :')
    	for num in number:
    		print(num)
    	print('\n')

![20200712124514800.png][]

cities={
    	'luoyang':{
    		'belong':'china',
    		'population':'1000000',
    		'fact':'the peony\'s hometown',
    	},
    	'paris':{
    		'belong':'france',
    		'population':'2000',
    		'fact':'Notre Dame de Paris was set on fire'
    	},
    	'moscow':{
    		'belong':'Russia',
    		'population':'34000',
    		'fact':'fierce fighting people',
    	}
    }
    for city,info in cities.items():
    	print(city.title()+':'+'\n')
    	for attribute,detail in info.items():
    		print(attribute.title()+': '+detail.title())

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3NodXl1ZGV4aWFvd3U_size_16_color_FFFFFF_t_70]: https://img-blog.csdnimg.cn/20200905163136872.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3NodXl1ZGV4aWFvd3U=,size_16,color_FFFFFF,t_70
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3NodXl1ZGV4aWFvd3U_size_16_color_FFFFFF_t_70 1]: https://img-blog.csdnimg.cn/20200905165254379.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3NodXl1ZGV4aWFvd3U=,size_16,color_FFFFFF,t_70
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