?? Accessing and Modifying Python Dictionaries ??

In the previous post, we covered what dictionaries are and how to create them. Now, let’s dive into how to access and modify dictionaries in Python.

1. ?? Accessing Values:

You can access the value associated with a key by using square brackets [] or the .get() method.

Example:

person = {'name': 'John', 'age': 30}
print(person['name'])  # Output: John
print(person.get('age', 'Not found'))  # Output: 30        

The .get() method is safer as it returns None if the key does not exist, rather than raising a KeyError.

2. ?? Modifying Dictionaries:

Dictionaries are mutable, allowing you to add, remove, or change key-value pairs after creation.

2.1. Adding and Updating Key-Value Pairs:

You can add a new key-value pair or update an existing one by assigning a value to a key.

person['city'] = 'New York'  # Add or update        

2.2. Removing Key-Value Pairs:

You can remove a key-value pair using the del statement or the .pop() method.

del person['age']  # Remove using del
person.pop('city')  # Remove using pop        

Stay tuned for the next post where we’ll explore ??? dictionary methods, nested dictionaries, and advanced use cases! ??

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