The Python Apprentice

Hoisting common functionality into a base class

Now we have the base Aircraft class we can refactor by hoisting into it other common functionality. For example, both the initializer and registration() methods are identical between the two subtypes:

class Aircraft:    def __init__(self, registration):        self._registration = registration    def registration(self):        return self._registration    def num_seats(self):        rows, row_seats = self.seating_plan()        return len(rows) * len(row_seats)class AirbusA319(Aircraft):    def model(self):        return "Airbus A319"    def seating_plan(self):        return range(1, 23), "ABCDEF"class Boeing777(Aircraft):    def model(self):        return "Boeing 777"    def seating_plan(self):        # For simplicities sake, we ignore complex # seating arrangement for ...