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Python Dictionary popitem() method
  • Last Updated : 03 Dec, 2020

Generating a random number has many application in daily life. In a list, various functions are supported for the same. A whole library is dedicated in Python to handle random numbers. But sometimes, we need to perform a similar task with a dictionary.

popitem() method in dictionary helps to achieve similar purpose. It removes the arbitrary key-value pair from the dictionary and returns it as a tuple. There is an update for this method from Python version 3.7 onwards that it removes the last inserted key-value pair from the dictionary and returns it as a tuple.

Syntax : dict.popitem()
Parameters : None
Returns : A tuple containing the arbitrary key-value pair from dictionary. That pair is removed from dictionary.

Code #1 : Demonstrating the use of popitem()




# Python 3 code to demonstrate
# working of popitem()
  
# initializing dictionary 
test_dict = { "Nikhil" : 7, "Akshat" : 1, "Akash" : 2 }
  
# Printing initial dict
print ("The dictionary before deletion : " + str(test_dict))
  
# using popitem() to return + remove arbitrary 
# pair
res = test_dict.popitem()
  
# Printing the pair returned
print ('The arbitrary pair returned is : ' + str(res))
  
# Printing dict after deletion
print ("The dictionary after removal : " + str(test_dict))

Output :



The dictionary before deletion : {'Nikhil': 7, 'Akshat': 1, 'Akash': 2}
The arbitrary pair returned is : ('Akash', 2)
The dictionary after removal : {'Nikhil': 7, 'Akshat': 1}

 

Practical Application: This particular function can be used to formulate the random name for playing a game or deciding the random ranklist without using any random function.

Code #2 : Demonstrating application of popitem()




# Python 3 code to demonstrate
# application of popitem()
  
# initializing dictionary 
test_dict = { "Nikhil" : 7, "Akshat" : 1, "Akash" : 2 }
  
# Printing initial dict
print ("The dictionary before deletion : " + str(test_dict))
  
n = len(test_dict)
  
# using popitem to assign ranks
for i in range(0, n) :
    print ("Rank " + str(i + 1) + " " + str(test_dict.popitem()))
  
# Printing end dict
print ("The dictionary after deletion : " + str(test_dict))

Output :

The dictionary before deletion : {'Nikhil': 7, 'Akshat': 1, 'Akash': 2}
Rank 1 ('Akash', 2)
Rank 2 ('Akshat', 1)
Rank 3 ('Nikhil', 7)
The dictionary after deletion : {}

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