Python – Find Keys with specific suffix in Dictionary

Sometimes, while working with dictionaries, we can have a problem in which we need to find the dictionary items that have some constraints on keys. One such constraint can be a suffix match on keys. Let’s discuss certain ways in which this task can be performed.

Method #1 : Using dictionary comprehension + endswith()
The combination of above two methods can be used to perform this particular task. In this, dictionary comprehension does the basic task of dictionary construction and endswith() performs the utility task of checking keys starting with specific suffix.

filter_none

edit
close

play_arrow

link
brightness_4
code

# Python3 code to demonstrate working of
# Keys with specific suffix in Dictionary
# Using dictionary comprehension + endswith()
  
# Initialize dictionary
test_dict = {'all' : 4, 'geeks' : 5, 'are' : 8, 'freaks' : 10}
  
# printing original dictionary
print("The original dictionary : " + str(test_dict))
  
# Initialize suffix
test_suf = 'ks'
  
# Using dictionary comprehension + endswith()
# Keys with specific suffix in Dictionary
res = {key:val for key, val in test_dict.items() if key.endswith(test_suf)}
  
# printing result 
print("Filtered dictionary keys are : " + str(res))

chevron_right






                        filter_none









Output :          


The original dictionary : {'geeks': 5, 'freaks': 10, 'are': 8, 'all': 4}
Filtered dictionary keys are : {'geeks': 5, 'freaks': 10}





 


Method #2 : Using map() + filter() + items() + endswith()

This particular task can also be performed using the combination of above functions. The map function ties the filter logic of endswith() to each dictionary’s items extracted by items().











                                    filter_none




                                    edit

                                    close




                                    play_arrow




                                    link

                                    brightness_4

                                    code
                                




















# Python3 code to demonstrate working of 


# Keys with specific suffix in Dictionary 


# Using map() + filter() + items() + endswith() 


  


# Initialize dictionary 


test_dict = {'all' : 4, 'geeks' : 5, 'are' : 8, 'freaks' : 10} 


  


# printing original dictionary 


print("The original dictionary : " + str(test_dict)) 


  


# Initialize suffix  


test_suf = 'ks'


  


# Using map() + filter() + items() + endswith() 


# Keys with specific suffix in Dictionary 


res = dict(filter(lambda item: item[0].endswith(test_suf), test_dict.items())) 


  


# printing result  


print("Filtered dictionary keys are : " + str(res)) 



















                        chevron_right







                        filter_none









Output :          


The original dictionary : {'geeks': 5, 'freaks': 10, 'are': 8, 'all': 4}
Filtered dictionary keys are : {'geeks': 5, 'freaks': 10}








    

        My Personal Notes
        arrow_drop_up
    

    

        
        

            
            
        

    


Recommended Posts:
manjeet_04
Check out this Author's contributed articles.
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 Improve this article if you find anything incorrect by clicking on  the "Improve Article" button below.