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《Python全栈开发:Python 列表List》
阅读量:235 次
发布时间:2019-03-01

本文共 502 字,大约阅读时间需要 1 分钟。

一、列表(list)

  • 列表由方括号包裹,元素之间用逗号分隔
  • 列表中的每个元素可以是各种数据类型:数值、字符串、列表(支持嵌套)、字典、布尔值等
  • 列表是有序的,可修改(值变,地址不变)

1. 下标、切片获取列表元素

my_list = [123, 'yexiang', ['美女', 18], False]print(my_list[0]) # 输出: 123print(my_list[2]) # 输出: ['美女', 18]print(my_list[0:]) # 输出: [123, 'yexiang', ['美女', 18], False]print(my_list[0:3]) # 输出: [123, 'yexiang', ['美女', 18]]print(my_list[0:-1]) # 输出: [123, 'yexiang', ['美女', 18]]

2. 列表操作示例

  • 列表的长度:len(my_list)
  • 添加元素:my_list.append('新元素')
  • 修改元素:my_list[0] = '修改后的元素'
  • 删除元素:del my_list[0]my_list.pop(0)

转载地址:http://rnyt.baihongyu.com/

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