在python中删除数组元素 [英] Deleting array elements in python

问题描述

所有，我想从另一个数组中删除一个数组的特定数组元素.这是一个例子.数组虽然是一长串单词.

All, I want to delete specific array elements of one array from the other. Here is an example. The arrays are a long list of words though.

A = ['at','in','the']
B = ['verification','at','done','on','theresa']

我想从B中删除出现在A中的单词.

I would like to delete words that appear in A from B.

B = ['verification','done','theresa']

这是我到目前为止尝试过的

Here is what I tried so far

for word in A:
    for word in B:
        B = B.replace(word,"")

我遇到错误:

AttributeError:列表"对象没有属性替换"

AttributeError: 'list' object has no attribute 'replace'

我应该用什么来获得它?

What should I use to get it?

推荐答案

使用列表推导获得完整答案:

Using a list comprehension to get the full answer:

[x for x in B if x not in A]

但是，您可能想了解有关替换的更多信息，所以...

However, you may want to know more about replace, so ...

python列表没有替换方法.如果只想从列表中删除元素，请将相关的切片设置为空列表.例如:

python list has no replace method. If you just want to remove an element from a list, set the relevant slice to be an empty list. For example:

>>> print B
['verification', 'at', 'done', 'on', 'theresa']
>>> x=B.index('at')
>>> B[x:x+1] = []
>>> print B
['verification', 'done', 'on', 'theresa']

请注意，尝试使用值B[x]做同样的事情不会从列表中删除该元素.

Note that trying to do the same thing with the value B[x] will not delete the element from the list.

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