1、使用del语句删除元素
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>>> i1 = [ "a" , 'b' , 'c' , 'd' ]
>>> del i1[ 0 ]
>>> print (i1)
[ 'b' , 'c' , 'd' ]
>>>
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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。
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>>> i1 = [ 'cai' , 'rui' , 'headsome' ]
>>> i2 = i1.pop()
>>> print (i1)
[ 'cai' , 'rui' ]
>>> print (i2)
headsome
>>>
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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:
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#!/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.
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弹出列表中任何位置处的元素:
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#!/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.
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3、remove 根据值删除元素
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motorcycles = [ 'honda' , 'yamaha' , 'suzuki' ]
motorcycles.remove( 'yamaha' )
print (motorcycles)
= = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = =
[ 'honda' , 'suzuki' ]
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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。
以上就是本文关于Python列表删除的三种方法代码分享的全部内容,希望对大家有所帮助。有问题请指出,感谢大家!
原文链接:http://www.cnblogs.com/caicairui/p/7550868.html