How can I add new keys to a dictionary?

To add a new key-value pair to a dictionary in Python, you can use the update() method or simply assign a value to a new key using square brackets [].

Here's an example:

Add a new key-value pair to a dictionary in Python using the update method

# Create an empty dictionary
my_dict = {}

# Add a new key-value pair using the update() method
my_dict.update({'name': 'John'})

# Add a new key-value pair using square brackets
my_dict['age'] = 30

print(my_dict)  # {'name': 'John', 'age': 30}

<div class="alert alert-info flex not-prose"> <span class="hidden md:block">Watch a video course </span> Python - The Practical Guide</div>

You can also use the update() method to add multiple key-value pairs at once:

Add multiple new key-value pairs to a dictionary in Python using the update method

my_dict.update({'name': 'John', 'age': 30, 'city': 'New York'})
print(my_dict)  # {'name': 'John', 'age': 30, 'city': 'New York'}