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| 1 | +# Car Class example |
| 2 | +# Info on classes: |
| 3 | +# https://docs.python.org/3/tutorial/classes.html |
| 4 | + |
| 5 | +class Car: |
| 6 | + """Common base class for all cars""" |
| 7 | + car_count = 0 # class variable for keeping a cars created counter |
| 8 | + |
| 9 | + # The __init__method accepts arguments for the |
| 10 | + # make, model, and mileage. It initializes the data |
| 11 | + # attributes with these values and increments the car counter. |
| 12 | + def __init__(self, year, make, model, mileage): |
| 13 | + self.__year = year |
| 14 | + self.__make = make |
| 15 | + self.__model = model |
| 16 | + self.__mileage = mileage |
| 17 | + Car.car_count += 1 |
| 18 | + |
| 19 | + # The __str__method returns a string representation of the object. |
| 20 | + def __str__(self): |
| 21 | + return '{0:s} {1:s} {2:s} with {3:,d} miles'.format(self.__year, self.__make, self.__model, self.__mileage) |
| 22 | + |
| 23 | + # The __add__method "overloards" the addition + operator for the Car class to increment the mileage. |
| 24 | + def __add__(self, miles): |
| 25 | + return self.__mileage + miles |
| 26 | + |
| 27 | + |
| 28 | + # The following methods are mutators (setters) |
| 29 | + # for the class's data attributes. |
| 30 | + def set_year(self, year): |
| 31 | + self.__year = year |
| 32 | + |
| 33 | + def set_make(self, make): |
| 34 | + self.__make = make |
| 35 | + |
| 36 | + def set_model(self, model): |
| 37 | + self.__model = model |
| 38 | + |
| 39 | + def set_mileage(self, mileage): |
| 40 | + self.__mileage = mileage |
| 41 | + |
| 42 | + # The following methods are the accessors (getters) |
| 43 | + # for the class's data attributes. |
| 44 | + def get_year(self): |
| 45 | + return self.__year |
| 46 | + |
| 47 | + def get_make(self): |
| 48 | + return self.__make |
| 49 | + |
| 50 | + def get_model(self): |
| 51 | + return self.__model |
| 52 | + |
| 53 | + def get_mileage(self): |
| 54 | + return self.__mileage |
| 55 | + |
| 56 | + # A method to increase the car mileage by miles driven |
| 57 | + def add_mileage(self, miles): |
| 58 | + self.__mileage += miles |
| 59 | + |
| 60 | + |
| 61 | +########################################################### |
| 62 | +## Test the Car class |
| 63 | +########################################################### |
| 64 | +## The main function. |
| 65 | +def main(): |
| 66 | + print('Create car1 ...') |
| 67 | + car1 = Car('2019', 'Ford', 'Mustang', 1000) |
| 68 | + print('Year:{:s}'.format(car1.get_year()) ) |
| 69 | + print('Make:{:s}'.format(car1.get_make()) ) |
| 70 | + print('Model: {:s}'.format(car1.get_model()) ) |
| 71 | + print('Mileage: {:,d}'.format(car1.get_mileage()) ) |
| 72 | + print(car1) |
| 73 | + |
| 74 | + print('\nAdd 500 to car1 mileage ...') |
| 75 | + car1.add_mileage(500) |
| 76 | + print(car1) |
| 77 | + |
| 78 | + print('\nCreate car2 ...') |
| 79 | + car2 = Car('2018', 'Chevrolet', 'Cruze', 5000) |
| 80 | + print(car2) |
| 81 | + |
| 82 | + print('\nCreate car3 ...') |
| 83 | + car3 = Car('2015', 'BMW', '3 Series', 8000) |
| 84 | + print(car3) |
| 85 | + |
| 86 | + print() |
| 87 | + print('Total Car Count: {:,d}'.format(Car.car_count)) |
| 88 | + print() |
| 89 | + |
| 90 | + |
| 91 | +# Call the main function. |
| 92 | +if __name__ == '__main__': |
| 93 | + main() |
| 94 | + |
| 95 | + |
| 96 | + |
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