Functions

def instead of func

Swift declares a function with func. Python uses def, and the body is indented instead of braced:

def greet(name):
    return f"Hello, {name}!"

return works exactly like Swift's return — it hands back a value and exits the function immediately. Unlike Swift, Python doesn't require (or even support) a -> ReturnType arrow by default — that's an optional type hint you'll meet in a later module, not an enforced contract.