3.12python作业

最新推荐文章于 2025-10-28 11:39:52 发布

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这篇博客展示了Python的基础操作，包括列表元素的访问、字符串拼接、列表的修改以及排序方法。通过示例代码，作者演示了如何打印列表中的特定元素，如何邀请名单上的人物参加晚宴，并在名单变动时更新邀请。此外，还介绍了如何对列表进行排序，包括升序、降序排列以及使用sort()函数改变列表顺序的操作。

# 3-1
names = ['James', 'Trump', 'Mike', 'John']
print(names[0])
print(names[1])
print(names[2])
print(names[-1])


# 3-4
names = ['James', 'Trump', 'John']
print(names[0] + ', I invite you to my dinner. Would you come?')
print(names[1] + ', I invite you to my dinner. Would you come?')
print(names[2] + ', I invite you to my dinner. Would you come?')


# 3-5
print("I am sorry to hear that John can't come to my dinner. So I invite another one.")
names[2] = 'Mike'
print(names[0] + ', I invite you to my dinner. Would you come?')
print(names[1] + ', I invite you to my dinner. Would you come?')
print(names[2] + ', I invite you to my dinner. Would you come?')

# 3-8
places = ['America', 'Hong Kong', 'Britain', 'Japan', 'Canada']
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)


# 3-11
list = [1,2,3,4]
print(list[4])