Python习题——2018-03-12作业

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"。

vehicles = ['bicycle', 'subway']
message = "I prefer riding the ofo " + vehicles[0] + "."
print(message)
message = "I would like to take the " + vehicles[1] + " to go out."
print(message)

输出:

I prefer riding the ofo bicycle.
I would like to take the subway to go out.


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。

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。

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。
people = ['Ma Huateng', 'Lei Jun', 'Liu Qiangdong']
for person in people :
	print(person + ", I'm glad to invite you to have a dinner with me tonight!")
print("\nOh, I just found a bigger table!")
people.insert(0, 'Mark Zuckerberg')
people.insert(2, 'Jeff Bezos')
people.append('Bill Gates')
for person in people :
	print(person + ", I'm glad to invite you to have a dinner with me tonight!")
print("\nOh, I just knew that my new table could not be delivered in time!")
while len(people) > 2 :
	print("I'm sorry I can't invite you to dinner, " + people.pop() + '.')
for person in people :
	print(person + ", you are still in the list of invitees.")
del people[0]
del people[0]
print(people)

输出:

Ma Huateng, I'm glad to invite you to have a dinner with me tonight!
Lei Jun, I'm glad to invite you to have a dinner with me tonight!
Liu Qiangdong, I'm glad to invite you to have a dinner with me tonight!

Oh, I just found a bigger table!
Mark Zuckerberg, I'm glad to invite you to have a dinner with me tonight!
Ma Huateng, I'm glad to invite you to have a dinner with me tonight!
Jeff Bezos, I'm glad to invite you to have a dinner with me tonight!
Lei Jun, I'm glad to invite you to have a dinner with me tonight!
Liu Qiangdong, I'm glad to invite you to have a dinner with me tonight!
Bill Gates, I'm glad to invite you to have a dinner with me tonight!

Oh, I just knew that my new table could not be delivered in time!
I'm sorry I can't invite you to dinner, Bill Gates.
I'm sorry I can't invite you to dinner, Liu Qiangdong.
I'm sorry I can't invite you to dinner, Lei Jun.
I'm sorry I can't invite you to dinner, Jeff Bezos.
Mark Zuckerberg, you are still in the list of invitees.
Ma Huateng, you are still in the list of invitees.
[]

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。
places = ['Sydney', 'Tokyo', 'New York', 'Silicon Valley', 'London']
print(places)
print(sorted(places))
print(places)
print(sorted(places, reverse = True))
print(places)
places.reverse()
print(places)
places.reverse()
print(places)
places.sort()
print(places)
places.sort(reverse = True)
print(places)

输出:

['Sydney', 'Tokyo', 'New York', 'Silicon Valley', 'London']
['London', 'New York', 'Silicon Valley', 'Sydney', 'Tokyo']
['Sydney', 'Tokyo', 'New York', 'Silicon Valley', 'London']
['Tokyo', 'Sydney', 'Silicon Valley', 'New York', 'London']
['Sydney', 'Tokyo', 'New York', 'Silicon Valley', 'London']
['London', 'Silicon Valley', 'New York', 'Tokyo', 'Sydney']
['Sydney', 'Tokyo', 'New York', 'Silicon Valley', 'London']
['London', 'New York', 'Silicon Valley', 'Sydney', 'Tokyo']
['Tokyo', 'Sydney', 'Silicon Valley', 'New York', 'London']

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