from ast import literal_eval

class Car:

'''A base car class.

Store the values of color, year, price and dimension.

Dimension attribute is not necessarily required to instantiate the car class.

'''

# class attribute... applied to all class instances

discount_percentage = 0.1

def __init__(self, color, year, price, dimension=None):

self.color = color

self.year = year

self.price = price

if dimension is None:

self.dimension = (None, None, None)

else:

self.dimension = dimension

assert isinstance(self.dimension, tuple)

assert len(self.dimension) == 3

def display_details(self):

'''Display car details. If not dimension then display none.'''

car = {

'color': self.color,

'year': self.year,

'price': self.price,

'dimension': self.dimension,

}

return car

@property

def discount_amount(self):

'''An attribute of Car class calculated by a method (using property decorator)

A pythonic way of getter.

'''

return self.price * self.discount_percentage

@property

def length(self):

return self.dimension[0]

@property

def width(self):

return self.dimension[1]

@property

def height(self):

return self.dimension[2]

def discount_price(self):

return self.price - self.discount_amount

def is_smallcar(self):

decider_length = 3800

return True if self.length < decider_length else False

@classmethod

def set_discount_percentage(cls, discount_percentage):

cls.discount_percentage = discount_percentage

@classmethod

def from_file(cls, file_data):

created_classes = []

for line in file_data:

year, price, dimension, color = int(line[0]), int(

line[1]), tuple(literal_eval(line[2])), line[3]

created_classes.append(cls(color, year, price, dimension))

return created_classes

class DieselCar(Car):

fuel_type = 'Diesel'

def __init__(self, color, year, price, dimension=None, injector=4):

super().__init__(color, year, price, dimension)

self.injector = injector

class ElectricCar(Car):

pass

if __name__ == '__main__':

dcar_1 = DieselCar('white', 2023, 1500000, (4500, 1200, 1300), 4)

# car1 = Car('black', 2022, 1000000, (4500, 1100, 1200))

# car2 = Car('grey', 2022, 1100000, (3700, 1000, 1100))

# print(car1.discount_percentage)

# print(car2.discount_percentage)

# Car.set_discount_percentage(0.15)

# print(car1.discount_percentage)

# with open('file_data.txt', 'r') as fl:

# lines = fl.readlines()

# lines = [line.rstrip('\n').split("-") for line in lines]

# print(lines)

# created_objects = Car.from_file(lines)

# for obj in created_objects:

# print(obj.display_details())