Python列表删除的三种方法代码分享

1、使用del语句删除元素

>>> i1 = ["a",'b','c','d']

>>> del i1[0]

>>> print(i1)

['b', 'c', 'd']

>>>

del语句将值从列表中删除后,就再也无法访问它了。

2、使用pop()删除元素

  pop()可删除列表末尾的元素,并让你能够接着使用它。食欲弹出(pop)源自这样的类比:列表就是一个栈,而删除列表末尾的元素相当于弹出栈顶元素。

>>> i1 = ['cai','rui','headsome']

>>> i2 = i1.pop()

>>> print(i1)

['cai', 'rui']

>>> print(i2)

headsome

>>>

 作用:假设列表中的摩托车是按照购买时间存储的,就可以使用方法pop()打印一条消息,指出最后购买的是哪款摩托车:

#!/usr/bin/env python

motorcycles = ['honda','yamaha','suzuki']

last_owned = motorcycles.pop()

print("The last motorcycle i owned was a " + last_owned.title() + '.')

================================

The last motorcycle i owned was a Suzuki.

弹出列表中任何位置处的元素:

#!/usr/bin/env python

motorcycles = ['honda','yamaha','suzuki']

last_owned = motorcycles.pop(0)

print("The last motorcycle i owned was a " + last_owned.title() + '.')

========================================

The last motorcycle i owned was a Honda.

3、remove 根据值删除元素

motorcycles = ['honda','yamaha','suzuki']

motorcycles.remove('yamaha')

print(motorcycles)

====================================

['honda', 'suzuki']

注意:remove()只删除一个指定的值。如果要删除的值可能在列表中出现多次,就需要使用循环来判断是否删除了所有的值。

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