Python入门 — 操作列表

目录

一、遍历列表

二、创建数值列表

1、range() 函数

2、range() 创建数值列表

3、列表推导式

三、使用列表的部分元素

1、切片

2、复制列表

四、元组

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一、遍历列表

和所有编程语言一样，首先可以考虑 for 循环

egs = [ 'aa', 'bb', 'cc' ]
for eg in egs:
    print(eg)

定义了一个列表，并定义一个 for 循环，：对于（for）列表 egs 中的每位 eg，都打印（print）元素 eg。输出结果如下：

aa

bb

cc

然后再写一个稍微复杂点的 for 循环

magicians = ['alice', 'david', 'carolina']
for magician in magicians:
    print(f"{magician.title()}, that was a great trick!")
    print(f"I can't wait to see your next trick, {magician.title()}.\n")
print("Thank you, everyone. That was a great magic show!")

注意：Python 根据缩进来判断代码行与程序其他部分的关系

输出结果如下：

Alice, that was a great trick!
I can't wait to see your next trick, Alice.

David, that was a great trick!
I can't wait to see your next trick, David.

Carolina, that was a great trick!
I can't wait to see your next trick, Carolina.

Thank you, everyone. That was a great magic show!

在 for 循环后面，没有缩进的代码都只执行一次。

二、创建数值列表

列表非常适合用于存储数值集合，而 Python 提供了很多工具&#