Python

popitem() method in dictionary

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popitem() method in dictionary - Python

This method is used to remove last item from a dictionary.

This method doesn’t take any argument and returns last item from dictionary as a tuple.

The time complexity of this method is O(1).

If the dictionary is empty and you call popitem method with the dictionary then it will raise error KeyError .

Syntax –

dictionary.popitem()

Parameters –

return → return last key value pair.

Example –

				
					my_dict={10:100,20:200,30:300,40:400,50:500}
print("Original dictionary:\n",my_dict)

my_dict.popitem()
print("Updated Dictionary:",my_dict)

# Output - 
# Original dictionary:
 # {10: 100, 20: 200, 30: 300, 40: 400, 50: 500}
# Updated Dictionary: {10: 100, 20: 200, 30: 300, 40: 400}

In the above example, first we create a dictionary with some items and store it in my_dict variable.

After creating a dictionary print the original dictionary on the output screen.

Then pop last item from the dictionary by using the .popitem() method.

Finally print the updated dictionary on the output screen.

Example –

				
					test_marks={'saurabh':8,'parn':9,'anurag':9,'vikram':6}
print('Original Dictionary:',test_marks)

n=len(test_marks)
for i in range(n):
	item=test_marks.popitem()
	print('name: '+item[0]+', marks: '+str(item[1]))

# Output -
# Original Dictionary: {'saurabh': 8, 'parn': 9, 'anurag': 9, 'vikram': 6}
# name: vikram, marks: 6
# name: anurag, marks: 9
# name: parn, marks: 9
# name: saurabh, marks: 8

Example –

				
					# Print the total marks obtained by student 

student_marks={'hindi':86,'math':88,'English':58,'Physics':87,'chemistry':87}
print("Original Dictionary:\n",student_marks)
n=len(student_marks)
s=0
for i in range(n):
	item=student_marks.popitem()
	s=s+item[1]

print("Total marks obtained by student:",s)
print("Updated Dictionary:",student_marks)

# Output -
# Original Dictionary:
# {'hindi': 86, 'math': 88, 'English': 58, 'Physics': 87, 'chemistry': 87}
# Total marks obtained by student: 406
# Updated Dictionary: {}

Python

popitem() method in dictionary

popitem() method in dictionary - Python

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