class Person:
    """
    This is the blueprint to define people
    """

    def __init__(self, name=None, dob=None):
        self.name = name
        self.dob = dob
        self.income = 0

    def age(self):
        return 10 # TODO implement today - self.dob

    def get_a_job(self, salary):
        self.income = salary

    def pay_bill(self):
        pass # TODO implement later

    def payday(self):
        self.bank_balance += self.income


fitz = Person(name="Fitz", dob="1/1/70")
bob = Person(name="Bob")

print(fitz.age())