How can I modify dictionaries in Python functions?

How can I modify dictionaries in Python functions?

You can modify dictionaries in Python functions by passing them as arguments and using methods like update() or direct assignment.

Can you show me an example of modifying a dictionary inside a function?

Sure! Here's a simple example:

def modify_dict(my_dict):
    my_dict['new_key'] = 'new_value'

my_dict = {'key': 'value'}
modify_dict(my_dict)
print(my_dict)  # Output: {'key': 'value', 'new_key': 'new_value'}

What happens if I try to modify a dictionary that is passed as a copy?

If you pass a dictionary as a copy, modifications won't affect the original dictionary. You need to pass it by reference.

Are there any best practices for modifying dictionaries in functions?

Yes, it's best to avoid modifying mutable objects like dictionaries directly unless necessary. Consider returning a new dictionary instead.