Question

Python 3>

Make a class called BMW:

Parameterized constructor with three instance variables (attributes):

Hint: def __init__(self, make, model, year)

Methods in BMW parent class (can leave as method stubs for now):

startEngine()

-must print "The engine is now on."

stopEngine()

-must print "The engine is now off."

Make another class called ThreeSeries

-Must inherit BMW

Hint: class ThreeSeries(BMW):

-Also passes the three attributes of the parent class and invoke parent

Hint: BMW.__init__(self, cruiseControlEnabled, make, model, year)

-Constructor must have the additional variable (attribute): cruiseControlEnabled (boolean)

Methods in ThreeSeries class (can leave as method stubs for now):

display()

-Must print the state of the cruiseControlEnabled attribute.

startEngine()

-Use super to use the functionality of parent method.

Hint: super().startEngine()

-And must additionally print "Button start is on."

NOTE: This will be an example of using super and method overriding if implemented correctly.

Similarly, make class called FiveSeries:

-Must inherit BMW

Hint: class FiveSeries(BMW):

-Also passes the three attributes of the parent class and invoke parent using the super() function.

Hint: super().__init__(parkingAssistEnabled, make, model, year)

-NOTE: you don't have to pass “self”.

-Constructor must have the additional variable (attribute): parkingAssistEnabled (boolean)

Methods in FIveSeries class (can leave as method stubs for now):

display()

-Must print the state of the parkingAssistEnabled attribute.

In the main section of your code:

Prompt the user for:

-Make

-Model

-Year

Ex.

Enter the threeseries make:

BMW

Enter model:

328i

Enter Year:

2018

Is cruise control on? (y or n)

y

Enter the fiveseries make:

BMW

Enter model:

328i

Enter Year:

2017

Is the parking assist enabled? (y or n)

n

-Create an object of the ThreeSeries class and of the FiveSeries class and invoke the constructor with the user input and the print the details using the methods in the classes.

Final Output Example:

Three Series...

This “Make” is a “Model” of “YEAR”

The engine is now on.

Button start is on.

Cruise control is on.

--------

FiveSeries...

This “Make” is a “Model” of “YEAR”

Starting engine...

The engine is now on.

Parking assist is off.

--------

Answer 1

Python Code:

class BMW:
   def __init__(self, make, model, year):
       """ Constructor """
       self.make = make
       self.model = model
       self.year = year
      
   def startEngine(self):
       print("The engine is now on.")
      
   def stopEngine(self):
       print("The engine is now off.")
      
class ThreeSeries(BMW):
   def __init__(self, cruiseControlEnabled, make, model, year):
       """ Constructor """
       BMW.__init__(self, make, model, year)
       self.cruiseControlEnabled = cruiseControlEnabled
      
   def display(self):
       if self.cruiseControlEnabled.lower() == 'y':
           print("Cruise control is on.")
       else:
           print("Cruise control is off.")
      
   def startEngine(self):
       super().startEngine()
       print("Button start is on.")
  
  
class FiveSeries(BMW):
   def __init__(self, parkingAssistEnabled, make, model, year):
       """ Constructor """
       BMW.__init__(self, make, model, year)
       self.parkingAssistEnabled = parkingAssistEnabled
      
   def display(self):
       if self.parkingAssistEnabled.lower() == 'y' :
           print("Parking assist is on.")
       else:  
           print("Parking assist is off.")
      
  
def main():
   """ Main function """
   # Reading input from user
   print("Enter the three series make:")
   make = input()
   print("Enter model:")
   model = input()
   print("Enter year:")
   year = input()
   print("Is cruise control on? (y or n)")
   cruise = input()
  
   # Reading input from user
   print("Enter the five series make:")
   make5 = input()
   print("Enter model:")
   model5 = input()
   print("Enter year:")
   year5 = input()
   print("Is the parking assist enabled? (y or n)")
   parking = input()
  
   print("\n----------------------------------------\n")
  
   # Creating objects
   threeObj = ThreeSeries(cruise, make, model, year)
   print("Three Series...")
   print("This " + make + " is a " + model + " of " + year)
   threeObj.startEngine()
   threeObj.display()
  
   print("\n----------------------------------------\n")
  
   # Creating objects
   fiveObj = FiveSeries(cruise, make, model, year)
   print("Five Series...")
   print("This " + make + " is a " + model + " of " + year)
   fiveObj.startEngine()
   fiveObj.display()
  
  
# Calling main function
main()

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Sample Run: