How can I add new keys to a dictionary in Python

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Is it possible to add a key to a Python dictionary after it has been created?
Feb 9, 2022 in Python by Dev
• 6,000 points
327 views

1 answer to this question.

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Yes, it is possible to add new keys to a dictionary in Python, after creating a dictionary.
Let us take an example
1) To create a Dictionary
2) To add one single key to the dictionary
3) To add multiple keys to the dictionary

Data = {'Apple': 100, 'Orange' : 150 , 'Banana' : 155} #create a dictionary
Data

Output

{'Apple': 100, 'Orange': 150, 'Banana': 155}


Data['Cherry'] = 200 # updating or adding a single value in the dictionary
Data


Output

{'Apple': 100, 'Orange': 150, 'Banana': 155, 'Cherry': 200}


Data.update({'Cherry' : 250, 'Kiwi' : 140})  #updating multiple key
Data


Output



{'Apple': 100, 'Orange': 150, 'Banana': 155, 'Cherry': 250, 'Kiwi': 140}

Here, the value in Cherry gets updated and another Key named Kiwi is added. Thus, update helps to update and even to 

add keys to the dictionary.
Hope this helps!

answered Feb 9, 2022 by Nandini
• 5,480 points

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