JuniorTheoryCommon

What does the program print?

Python

def price(amount, discount=0, tax=20):
    return amount - discount + tax


print(price(100, tax=0), price(100, 5))

100 115

Expecting 5 to go to tax, the parameter after it in the call: positional arguments fill parameters left to right, so 5 becomes discount.
Expecting a TypeError for skipping discount: a keyword argument sets tax by name, and discount keeps its default 0.

JuniorTheoryCommon

Python

def price(amount, discount=0, tax=20):
    return amount - discount + tax


print(price(100, tax=0), price(100, 5))

100 115

Expecting 5 to go to tax, the parameter after it in the call: positional arguments fill parameters left to right, so 5 becomes discount.
Expecting a TypeError for skipping discount: a keyword argument sets tax by name, and discount keeps its default 0.