*args, **kwargs y argumentos por nombre · Python

def invoice_total(*amounts, discount=0.0, tax=0.21):    """Any number of amounts; discount and tax are keyword-only."""    net = sum(amounts) * (1 - discount)    return round(net * (1 + tax), 2)def log_event(event, **details):    """Extra named arguments arrive in a dict."""    fields = ", ".join(f"{key}={value}" for key, value in details.items())    print(f"[{event}] {fields}")def ship(order_id, *, express=False):    """The bare * makes express keyword-only."""    speed = "express" if express else "standard"    print(f"Order {order_id} ships by {speed} delivery")print("Total:", invoice_total(100, 50, 25))print("With 10% off:", invoice_total(100, 50, 25, discount=0.1))print("Reduced tax:", invoice_total(80, tax=0.10))prices = [19.99, 5.01, 75.0]print("From a list:", invoice_total(*prices))  # unpack a list into *amountslog_event("login", user="ana", ip="10.0.0.7")extra = {"order": 1042, "status": "shipped"}log_event("update", **extra)       # unpack a dict into **detailsship(1042, express=True)try:    ship(1043, True)               # positional: not allowedexcept TypeError as error:    print("Error:", error)