标签：除了 rem 结果 删除 was tle 运行 它的 指定
一、修改
代码示例 motorcycles = [‘honda‘, ‘yamaha‘, ‘suzuki‘] print(motorcycles) motorcycles[0] = ‘ducati‘ print(motorcycles)
运行结果 [‘honda‘, ‘yamaha‘, ‘suzuki‘] [‘ducati‘, ‘yamaha‘, ‘suzuki‘]
二、添加
（一）使用append()添加在末尾
代码示例 motorcycles = [‘honda‘, ‘yamaha‘, ‘suzuki‘] print(motorcycles) motorcycles.append(‘ducati‘) print(motorcycles)
方法append()将元素‘ducati‘添加到了列表末尾，而不影响列表中的其他所有元素： [‘honda‘, ‘yamaha‘, ‘suzuki‘] [‘honda‘, ‘yamaha‘, ‘suzuki‘, ‘ducati‘]
（二）使用insert()在列表任意位置插入元素（需要指定新元素的索引和值）
代码示例 motorcycles = [‘honda‘, ‘yamaha‘, ‘suzuki‘] motorcycles.insert(0, ‘ducati‘) print(motorcycles)
运行结果 [‘ducati‘, ‘honda‘, ‘yamaha‘, ‘suzuki‘]
三、删除
（一）使用del语句删除元素（知道要删除的元素在列表中的位置）
代码示例 motorcycles = [‘honda‘, ‘yamaha‘, ‘suzuki‘] print(motorcycles) del motorcycles[0] print(motorcycles)
运行结果 [‘honda‘, ‘yamaha‘, ‘suzuki‘] [‘yamaha‘, ‘suzuki‘]
（二）使用方法pop()删除元素（要将元素从列表中删除，并接着使用它的值，可以使用pop()来删除列表中任何位置的元素，只需在括号中指定要删除的元素的索引即可。）
代码示例① motorcycles = [‘honda‘, ‘yamaha‘, ‘suzuki‘] print(motorcycles) popped_motorcycle = motorcycles.pop() print(motorcycles) print(popped_motorcycle)
运行结果①（.pop()删除了列表中的末尾元素） [‘honda‘, ‘yamaha‘, ‘suzuki‘] [‘honda‘, ‘yamaha‘] suzuki
代码示例② motorcycles = [‘honda‘, ‘yamaha‘, ‘suzuki‘] first_owned = motorcycles.pop(0) print(‘The first motorcycle I owned was a ‘ + first_owned.title() + ‘.‘)
运行结果②
The first motorcycle I owned was a Honda.
（三）根据值删除元素（只知道要删除的元素的值，不知道要从列表中删除的值所处的位置。可使用方法remove()，可接着使用它的值）
代码示例① motorcycles = [‘honda‘, ‘yamaha‘, ‘suzuki‘, ‘ducati‘] print(motorcycles) motorcycles.remove(‘ducati‘) print(motorcycles)
运行结果① [‘honda‘, ‘yamaha‘, ‘suzuki‘, ‘ducati‘] [‘honda‘, ‘yamaha‘, ‘suzuki‘]
代码示例② motorcycles = [‘honda‘, ‘yamaha‘, ‘suzuki‘, ‘ducati‘] print(motorcycles) too_expensive = ‘ducati‘ motorcycles.remove(too_expensive) print(motorcycles) print("\nA " + too_expensive.title() + " is too expensive for me.")
运行结果② [‘honda‘, ‘yamaha‘, ‘suzuki‘, ‘ducati‘] [‘honda‘, ‘yamaha‘, ‘suzuki‘] A Ducati is too expensive for me.
标签：除了 rem 结果 删除 was tle 运行 它的 指定
原文地址：https://www.cnblogs.com/pyme/p/12824440.html
