Python列表:元素的修改添加删除和排序

Posted

tags:

篇首语:本文由小常识网(cha138.com)小编为大家整理,主要介绍了Python列表:元素的修改添加删除和排序相关的知识,希望对你有一定的参考价值。

本文参考自《Python编程:从入门到实践》,作者:Eric Matthes,译者:袁国忠

操作 语法 举例 结果
修改元素  

motocycles = [‘honda‘, ‘yamaha‘, ‘suzuki‘]

print (motocycles)

 

motocycles[0] = ‘ducati‘

print (motocycles)

[‘honda‘, ‘yamaha‘, ‘suzuki‘]

 

[‘ducati‘, ‘yamaha‘, ‘suzuki‘]

添加元素

 

在列表末尾添加元素:append()

 

motocycles = [‘honda‘, ‘yamaha‘, ‘suzuki‘]

print (motocycles)

 

motocycles.append(‘ducati‘)

print (motocycles)

 

[‘honda‘, ‘yamaha‘, ‘suzuki‘]

 

[‘honda‘, ‘yamaha‘, ‘suzuki‘, ‘ducati‘]

在列表中插入元素:insert()

 

motocycles = [‘honda‘, ‘yamaha‘, ‘suzuki‘]

print (motocycles)

 

motocycels.insert(0, ‘ducati‘)

print (motocycles)

 

[‘honda‘, ‘yamaha‘, ‘suzuki‘]

 

[‘ducati‘, ‘honda‘, ‘yamaha‘, ‘suzuki‘]

删除元素

 

 

根据索引删除:del,无法继续使用

 

 

motocycles = [‘honda‘, ‘yamaha‘, ‘suzuki‘]

print (motocycles)

 

del motocycles[1]

print (motocycles)

 

 

[‘honda‘, ‘yamaha‘, ‘suzuki‘]

 

[‘honda‘, ‘suzuki‘]

删除末尾的元素:pop(),可以继续使用

也可以根据索引删除,如motocycles.pop(0)

 

motocycles = [‘honda‘, ‘yamaha‘, ‘suzuki‘]

print (motocycles)

 

popped_motocycle = motocycles.pop()

print (motocycles)

print (popped_motocycle)

 

 

[‘honda‘, ‘yamaha‘, ‘suzuki‘]

 

[‘honda‘, ‘yamaha‘]

 

suzuki

 

不知道索引时,根据值删除元素:remove(),可以继续使用

 

 motocycles = [‘honda‘, ‘yamaha‘, ‘suzuki‘, ‘ducati‘]

print (motocycles)

 

too_expensive = ‘ducati‘

motocycles.remove(too_expensive)

print (motocycles)

print (too_expensive)

 [‘honda‘, ‘yamaha‘, ‘suzuki‘, ‘ducati‘]

 

[‘honda‘, ‘yamaha‘, ‘suzuki‘]

 

ducati

 

元素排序

永久性排序:sort()

 

反方向排序:sort(reverse = True)

cars = [‘bmw‘, ‘audi‘, ‘toyota‘, ‘subaru‘]

print (cars)

 

cars.sort()

print (cars)

 

cars = [‘bmw‘, ‘audi‘, ‘toyota‘, ‘subaru‘]

cars.sort(reverse = True)

print (cars)

[‘bmw‘, ‘audi‘, ‘toyota‘, ‘subaru‘]

 

[‘audi‘, ‘bmw‘, ‘subaru‘, ‘toyota‘]

 

[‘toyota‘, ‘subaru‘, ‘bmw‘, ‘audi‘]

临时性排序:sorted()

 

反方向排序:sorted(reverse = True)

cars = [‘bmw‘, ‘audi‘, ‘toyota‘, ‘subaru‘]

print (cars)

print (sorted(cars))

print (cars)

[‘bmw‘, ‘audi‘, ‘toyota‘, ‘subaru‘]

 

[‘audi‘, ‘bmw‘, ‘subaru‘, ‘toyota‘]

 

[‘bmw‘, ‘audi‘, ‘toyota‘, ‘subaru‘]

 

永久性反转列表元素的排列顺序:reverse()

cars = [‘bmw‘, ‘audi‘, ‘toyota‘, ‘subaru‘]

print (cars)

 

cars.reverse()

print (cars)

 

cars.reverse()

print (cars)

[‘bmw‘, ‘audi‘, ‘toyota‘, ‘subaru‘]

 

[‘subaru‘, ‘toyota‘, ‘audi‘, ‘bmw‘]

 

[‘bmw‘, ‘audi‘, ‘toyota‘, ‘subaru‘]

以上是关于Python列表:元素的修改添加删除和排序的主要内容,如果未能解决你的问题,请参考以下文章

Python ❀ 列表与元组

Python ❀ 列表与元组

Python ❀ 列表与元组

python列表

python列表

python列表