Building a factory method

Now that you're ready to get your feet wet building factory methods, you'll start by creating a Checkout class, using the factory method design pattern. The following Customer interface has been defined for you, along with the RewardsMember and NewCustomer concrete products. Check it out below!

class Customer(ABC):
  @abstractmethod
  def make_payment(self, price):
    pass

class RewardsMember(Customer):
  def make_payment(self, price):
    print(f"""Total price for rewards member is 
          ${price * .90}, which is 10% off""")

class NewCustomer(Customer):
  def make_payment(self, price):
    print(f"""Total price for new customer is ${price}""")

Deze oefening maakt deel uit van de cursus

Intermediate Object-Oriented Programming in Python

Cursus bekijken

Oefeninstructies

Create a _get_customer() factory method that takes a customer_type, and returns an object of the appropriate concrete product.
In the complete_transaction() method, use the previously-defined factory method to return a customer, then, make a payment using the price passed into the make_payment() method.

Praktische interactieve oefening

Probeer deze oefening eens door deze voorbeeldcode in te vullen.

class Checkout:
  # Create a _get_customer() factory method 
  def ____(self, customer_type):
    if ____ == "Rewards Member":
      return ____()
    elif ____ ____ "New Customer":
      return ____()
  
  # Define the complete_transaction() method
  def complete_transaction(self, customer_type, price):
    customer = ____.____(____)
    ____.____(____)

Code bewerken en uitvoeren