python从入门到实践第三章的课后练习作业

#3-1 姓名: 将一些朋友的姓名存储在一个列表中,并将其命名为 names。依次访问
#r该列表中的每个元素,从而将每个朋友的姓名都打印出来。

names  = ['sixUncle','huicong','chaoming']

for name in names:
	print(name)

'''
3-2 问候语: 继续使用练习 3-1 中的列表,但不打印每个朋友的姓名,而为每人打
印一条消息。每条消息都包含相同的问候语,但抬头为相应朋友的姓名。
'''

names  = ['sixUncle','huicong','chaoming']

for name in names:
	print('I am glad to make friends with you, '+name+ '!')

'''
3-3 自己的列表: 想想你喜欢的通勤方式,如骑摩托车或开汽车,并创建一个包含
多种通勤方式的列表。根据该列表打印一系列有关这些通勤方式的宣言,如“I would like
to own a Honda motorcycle”。
'''

bikes = ['fenghuang','feige','yongjiu']

for bike in bikes:
	print("I would like to own a "+bike+" bike!")

'''
3-4 嘉宾名单:如果你可以邀请任何人一起共进晚餐(无论是在世的还是故去的),
你会邀请哪些人?请创建一个列表,其中包含至少 3 个你想邀请的人;然后,使用这个
列表打印消息,邀请这些人来与你共进晚餐。
'''

persons = ['mother','father','grandparents','sister']

print('I want to invite ',end ='')
for person in persons:
	if person == persons[len(persons)-1]:
		print(person+' ',end='')
	else:
		print(person+', ',end='')

print('to have dinner with me!')

'''
3-5 修改嘉宾名单:你刚得知有位嘉宾无法赴约,因此需要另外邀请一位嘉宾。
 以完成练习 3-4 时编写的程序为基础,在程序末尾添加一条 print 语句,指出哪
位嘉宾无法赴约。
 修改嘉宾名单,将无法赴约的嘉宾的姓名替换为新邀请的嘉宾的姓名。
 再次打印一系列消息,向名单中的每位嘉宾发出邀请。
'''

persons = ['mother','father','grandparents','sister']

print('I want to invite ',end ='')
for person in persons:
	if person == persons[len(persons)-1]:
		print(person+' ',end='')
	else:
		print(person+', ',end='')
	

print('to have dinner with me!')
print('But to my disappointment, '+persons[2]+' can not have fun with me.')

persons[2] = 'cousins'

print('I invite ',end ='')
for person in persons:
	if person == persons[len(persons)-1]:
		print(person+' ',end='')
	else:
		print(person+', ',end='')

print('to have dinner with me at last!')

'''
3-6 添加嘉宾:你刚找到了一个更大的餐桌,可容纳更多的嘉宾。请想想你还想邀
请哪三位嘉宾。
 以完成练习 3-4 或练习 3-5 时编写的程序为基础,在程序末尾添加一条 print 语
句,指出你找到了一个更大的餐桌。
 使用 insert()将一位新嘉宾添加到名单开头。
 使用 insert()将另一位新嘉宾添加到名单中间。
 使用 append()将最后一位新嘉宾添加到名单末尾。
 打印一系列消息,向名单中的每位嘉宾发出邀请。
'''

persons = ['mother','father','grandparents','sister']

print('I want to invite ',end ='')
for person in persons:
	if person == persons[len(persons)-1]:
		print(person+' ',end='')
	else:
		print(person+', ',end='')

print('to have dinner with me!')
print('But to my disappointment, '+persons[2]+' can not have fun with me.')

persons[2] = 'cousins'

print('I invite ',end ='')
for person in persons:
	if person == persons[len(persons)-1]:
		print(person+' ',end='')
	else:
		print(person+', ',end='')

print('to have dinner with me instead!')
print('I am happy to find a bigger desk now, so I can invite more persons!')

persons.insert(0,'sixUncle')
persons.insert(2,'ahong')
persons.append('liying')

print('I invite ',end ='')
for person in persons:
	if person == persons[len(persons)-1]:
		print(person+' ',end='')
	else:
		print(person+', ',end='')

print('to have dinner with me at last!')

'''
3-7 缩减名单:你刚得知新购买的餐桌无法及时送达,因此只能邀请两位嘉宾。
 以完成练习 3-6 时编写的程序为基础,在程序末尾添加一行代码,打印一条你只
能邀请两位嘉宾共进晚餐的消息。
 使用 pop()不断地删除名单中的嘉宾,直到只有两位嘉宾为止。每次从名单中弹
出一位嘉宾时,都打印一条消息,让该嘉宾知悉你很抱歉,无法邀请他来共进
晚餐。
 对于余下的两位嘉宾中的每一位,都打印一条消息,指出他依然在受邀人之列。
 使用 del 将最后两位嘉宾从名单中删除,让名单变成空的。打印该名单,核实程
序结束时名单确实是空的。
'''

persons = ['mother','father','grandparents','sister']

print('I want to invite ',end ='')
for person in persons:
	if person == persons[len(persons)-1]:
		print(person+' ',end='')
	else:
		print(person+', ',end='')

print('to have dinner with me!')
print('But to my disappointment, '+persons[2]+' can not have fun with me.')

persons[2] = 'cousins'

print('I invite ',end ='')
for person in persons:
	if person == persons[len(persons)-1]:
		print(person+' ',end='')
	else:
		print(person+', ',end='')

print('to have dinner with me instead!')
print('I am happy to find a bigger desk now, so I can invite more persons!')

persons.insert(0,'lily')
persons.insert(2,'ahong')
persons.append('liying')

print('I invite ',end ='')
for person in persons:
	if person == persons[len(persons)-1]:
		print(person+' ',end='')
	else:
		print(person+', ',end='')

print('to have dinner with me at last!')
print('aha,how unlucky I am, my desk can not arrive in time, so I just must invite two persons')

while len(persons)>2:
	print(persons.pop()+', I am sorry for that I can not invite you to my desk')



for person in persons:
	print(person+', you are still in my list, please come to my dinnner and have fun with me!')

del persons[0]
del persons[0]

print('show list after del')
print(persons)

'''
3-8 放眼世界:想出至少 5 个你渴望去旅游的地方。
 将这些地方存储在一个列表中,并确保其中的元素不是按字母顺序排列的。
 按原始排列顺序打印该列表。不要考虑输出是否整洁的问题,只管打印原始
Python 列表。
 使用 sorted()按字母顺序打印这个列表,同时不要修改它。
 再次打印该列表,核实排列顺序未变。
 使用 sorted()按与字母顺序相反的顺序打印这个列表,同时不要修改它。
 再次打印该列表,核实排列顺序未变。
 使用 reverse()修改列表元素的排列顺序。 打印该列表, 核实排列顺序确实变了。
 使用 reverse()再次修改列表元素的排列顺序。打印该列表,核实已恢复到原来
的排列顺序。
 使用 sort()修改该列表,使其元素按字母顺序排列。打印该列表,核实排列顺
序确实变了。
 使用 sort()修改该列表,使其元素按与字母顺序相反的顺序排列。打印该列表,
核实排列顺序确实变了。
'''
destinations = ['solar','moon','Mars','Jupiter','hometown']

print('Original order:')
for destination in destinations:
	print(destination +' ',end='')
print('\n')

print('using sorted function:')
for destination in sorted(destinations):
	print(destination +' ',end='')
print('\n')

print('see whether destinations is changed:')
for destination in destinations:
	print(destination +' ',end='')
print('\nnot changed\n')

print('using sorted function(reverse = True):')
for destination in sorted(destinations,reverse = True):
	print(destination +' ',end='')
print('\n')

print('see whether destinations is changed:')
for destination in destinations:
	print(destination +' ',end='')
print('\nnot changed\n')

destinations.reverse()
print('using reverse() function:')
for destination in destinations:
	print(destination +' ',end='')
print('\n')

destinations.reverse()
print('using reverse() function(Twice):')
for destination in destinations:
	print(destination +' ',end='')
print('\n')

destinations.sort()
print('using sort() function:')
for destination in destinations:
	print(destination +' ',end='')
print('\n')

destinations.sort(reverse = True)
print('using sort(reverse = True) function:')
for destination in destinations:
	print(destination +' ',end='')
print('\n')

'''
在完成练习 3-4~练习 3-7 时编写的程序之一中,使用 len()打印一
条消息,指出你邀请了多少位嘉宾来与你共进晚餐。
'''

persons = ['mother','father','grandparents','sister']

print('I want to invite ',end ='')
for person in persons:
	if person == persons[len(persons)-1]:
		print(person+' ',end='')
	else:
		print(person+', ',end='')
print('to have dinner with me!')

print('So I invite '+str(len(persons))+' persons at last!')

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