Anagram checking in Python using collections.Counter()

Write a function to check whether two given strings are anagram of each other or not. An anagram of a string is another string that contains same characters, only the order of characters can be different. For example, “abcd” and “dabc” are anagram of each other.

Examples:

Input : str1 = “abcd”, str2 = “dabc”
Output : True

Input : str1 = “abcf”, str2 = “kabc”
Output : False



This problem has existing solution please refer Check whether two strings are anagram of each other link. We will solve this problem in python in a single line using collections.Counter() module.

filter_none

edit
close

play_arrow

link
brightness_4
code

# Python code to check if two strings are
# anagram
from collections import Counter
  
def anagram(input1, input2):
  
    # Counter() returns a dictionary data
    # structure which contains characters 
    # of input as key and their frequencies
    # as it's corresponding value
    return Counter(input1) == Counter(input2)
  
# Driver function
if __name__ == "__main__":
    input1 = 'abcd'
    input2 = 'dcab'
    print anagram(input1, input2)

chevron_right






                        filter_none








Output:


True



 How dictionary comparison works in python ?

If we have two dictionary data structures in python dict1 = {‘a’:2,’b’:3,’c’:1} and dict2 = {‘b’:3,’c’:1,’a’:2} and we compare both of them like dict1=dict2 then it will result True. In python ordinary dictionary data structure does not follow any ordering of keys, when we compare two dictionaries then it compares three checks in order number of keys (if they don’t match, the dicts are not equal), names of keys (if they don’t match, they’re not equal) and value of each key (they have to be ‘==’, too).


This article is contributed by Shashank Mishra (Gullu). If you like GeeksforGeeks and would like to contribute, you can also write an article using contribute.geeksforgeeks.org or mail your article to contribute@geeksforgeeks.org. See your article appearing on the GeeksforGeeks main page and help other Geeks.


Please write comments if you find anything incorrect, or you want to share more information about the topic discussed above.





    

        My Personal Notes
        arrow_drop_up
    

    

        
        

            
            
        

    


Recommended Posts: