Removing common elements between two lists

advertisements

Possible Duplicate:
Python list subtraction operation

I want to remove the common elements between two lists. I mean something like this

a=[1,2,3,4,5,6,7,8]
b=[2,4,1]
# I want the result to be like
res=[3,5,6,7,8]

Is there any simple pythonic way to do this ?

use sets :

res = list(set(a)^set(b))

Related Articles

How to check the common elements between two lists in python

I am having a bit of trouble when I try and check for overlapping elements in list. This means that I will have to check for common elements between two lists. The way in which my programme works is that the player enters their two end coordinates fo

Find common elements between N lists in Java

I need to write a Java program that finds the intersection (common elements) of an arbitrary number of lists or arrays of integers (of arbitrary length). I guess that Java Lists may have a useful method in order to achieve this, but I am taking a loo

find the non-common element between two networks

In an interview it was asked to find non- common elements between two string arrays. Eg: String a[]={"a","b","c","d"}; String b[]={"b","c"}; O/p should be a,d I have answered to the question that

Common elements in two lists with duplicates

I want to find the common elements in two [lists, vectors, sequences] when there can be duplicates. (common-elements [1] [1]) ; [1] (common-elements [1 2] [1 1]) ; [1] (common-elements [1 1] [1 1 1]) ; [1 1] Here is what I currently have: (defn remov

Deleting common elements between two different Arraylist

Sorry If you are thinking that it is a repeated post. But the situation is different here. I have read several posts for it but not getting the exact thing I am looking for. I know How to develop a complex logic for this but please take a look this i

remove common element of two arraylist in Android

Hello friends i have two arraylist mArrayListMySkuVarients and mArrayListAllVarients and i want to remove common element form these two arraylist and store it third one mArrayListCommonVarients so below is my code mArrayListMySkuVarients =new ArrayLi

Java Removes common elements between 2 ArrayList of objects

I have a Java class as class Students{ private String fName; private String lName; private String uName; public Students(String fName, String lName, String uName) { this.fName = fName; this.lName = lName; this.uName = uName; } public String getuName(

Python - eliminates the common elements of two lists

If i have two lists: a = [1,2,1,2,4] and b = [1,2,4] how do i get a - b = [1,2,4] such that one element from b removes only one element from a if that element is present in a.You can use itertools.zip_longest to zip the lists with different length th

Common elements in two lists

I have two arrayLists with 3 integer. I want to find a way to return the common elements of the two lists. Has anynody idea, how can I achieve this?Use Collection#retainAll(). listA.retainAll(listB); // listA now contains only the elements which are

Find common elements from two lists of lists

I have two lists of lists containing some 3D coordinates like this (for example): a = [[1, 2, 3], [4, 5, 6], [4, 2, 3]] b[0] = [[11, 22, 3], [12, 34, 6], [41, 2, 34], [198, 213, 536], [1198, 1123, 1156]] b[1] = [[11, 22, 3], [42, 25, 64], [43, 45, 23

Exchanging list elements between two lists in python?

I have a piece of assessment that requires me to swap words within a list. I have given a txt file that contains a column of words that are the 'old words' and a column of word that are the 'new words'. I am required to define a function that check t