How do I handle default parameters in Python functions?

How do I handle default parameters in Python functions?

In Python, you can define default parameters by assigning a value to them in the function definition. For example:

def greet(name='Guest'):
    return f'Hello, {name}!'

This way, if no argument is provided, 'Guest' will be used as the default.

Can you give me an example of calling that function?

Sure! You can call the function without any arguments to use the default:

greet()  # Output: 'Hello, Guest!'

Or you can provide a name:

greet('Alice')  # Output: 'Hello, Alice!'

What happens if I pass None as an argument?

If you pass None, it will override the default value:

greet(None)  # Output: 'Hello, None!'

To avoid this, you can check for None inside the function.

How can I set multiple default parameters?

You can set multiple default parameters by separating them with commas in the function definition:

def introduce(name='Guest', age=0):
    return f'Hello, {name}, you are {age} years old.'