How can I add new keys to a dictionary in Python

Question

Is it possible to add a key to a Python dictionary after it has been created?

Answer 1

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!