coffee.py

class coffee:
    def __init__(self, person):
        self.level = 0
        self.person = person

    def drink(self, size):
        self.level -= size

    def fill(self):
        self.level = 10

    def pickup(self):
        if self.level > 0:
            self.person.smile()
            self.drink(person.sip_size)
        else:
            self.person.frown()
            self.fill()
        self.pickup()