How do I use the nonlocal keyword in Python?

How do I use the nonlocal keyword in Python?

The nonlocal keyword is used in nested functions to refer to variables in the nearest enclosing scope that is not global. Would you like an example?

Yes, please provide an example.

Sure! Here's a simple example:

x = 10

def outer_function():
    x = 20
    
    def inner_function():
        nonlocal x
        x += 5
        return x
    
    inner_function()
    return x

print(outer_function())  # Output will be 25

What happens if I don't use nonlocal?

If you don't use nonlocal, the inner function will create a new local variable x, and the outer x will remain unchanged.