Updating Elements in a Dictionary

☞ If a key exists in a dictionary, then it will update the value of that particular key in the dictionary.

☞ If the key does not exist in a dictionary, then it will add a key-value pair in the dictionary.

Syntax :

 
<dictionary_name> [<key>] = value

Example :

 
D = {10:"Ten", 20:"Tweeeenty"}
print(D)
D[20] = "Twenty"     #it will update value of particular key
print(D)
D[30] = "Thirty"     #it will add new item to dictionary
print(D)

Output :

 
{10: 'Ten', 20: 'Tweeeenty'}
{10: 'Ten', 20: 'Twenty'}
{10: 'Ten', 20: 'Twenty', 30: 'Thirty'}

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📘 Classs XI : Revision of Python

📝 Chapter 1: Basics of Python

📝 Chapter 2: Operators in Python

📝 Chapter 3: Decision-Control in Python

📝 Chapter 4: Loops in Python

📝 Chapter 5: String in Python

📝 Chapter 6: List in Python

📝 Chapter 7: Tuples in Python

📝 Chapter 8: Dictionary in Python

📘 Unit 1: Computational Thinking & Programming-2

📝 Chapter 1: Functions in Python

📝 Chapter 2: Exception Handling in Python

📝 Chapter 3: File Handling in Python

📝 Chapter 4: Data Structure in Python

📘 Unit 2: Database Management

📝 Chapter 1: DBMS-MySQL

📝 Chapter 2: Interface of Python with SQL

📘 Unit 3: Computer Network

📝 Chapter 1: Computer Networks

Updating Elements in a Dictionary