COMPS III: Unit 4 Code Along

Overview

This unit we'll be continuing to build out our e-commerce store by incorporating inheritance into our system. Last unit we created Product and ShoppingCart classes. However, there are many different types of products that our store could have that require special information.

This unit we'll be adding classes for ClothingProduct and ElectronicProduct using inheritance. You can use the code you completed last week, but we have included the completed unit 3 in app.py.

VS Code - app.py has syntax instructions

1. Define a ClothingProduct class that is a child of the Product class.
2. Call the __init__ method in the child class using either Product or super(). Set the name, price, and sku properties.
3. Set the size and color to the values that are passed into the constructor.
4. Finally, create a clothing_info method that returns information about the object in the form "[NAME] (SKU: [SKU]) - $[PRICE] - Size: [SIZE], Color: [COLOR]""
5. Run the tests! test_clothing_product, test_clothing_product_attributes, and test_clothing_info tests should now be passing!

VS Code - main.py has syntax instructions

6. Import the ClothingProduct class into the file. The Product and ShoppingCart class was imported last week.
7. Inside the main() function that was created last week, create an instance of the ClothingProduct class and print() out the object. Show how it inherited the __str__ method from the Product class.
   • NOTE: Polymorphism is covered next week, so we're explicitly not adding __str__ method this week.
8. Call the clothing_info() method to see the information about the items that you created.
9. Add both items the cart using add_items. Print out the new cart info.

VS Code - app.py has syntax instructions

10. Define a ElectronicsProduct class that is a child of the Product class.
11. Call the __init__ method in the child class using either Product or super(). Set the name, price, and sku properties.
12. Set the warranty_months to the value that are passed into the constructor.
13. Create a method called electronics_info that takes the object as an argument. It should return a string in the format "[NAME] (SKU: [SKU]) - $[PRICE] - Warranty: [WARRANTY_MONTHS] months".
14. Run the tests! test_electronics_product, test_electronics_product_attributes, and test_electronics_info should now be passing.
15. Create a method called under_warranty that takes the object and months as an argument. If the number of months passed in is less than the warranty_months, then return True. Otherwise, return False.
16. Run the tests! test_under_warranty should now be passing.

VS Code - main.py has syntax instructions

17. Import the ElectronicsProduct class into the file.
18. Inside the main() function, create an instance of the ElectronicsProduct class and print() out the object. Show how it also inherited the __str__ method from the Product class.
19. Call electronics_info() to see the additional information about the object.
20. Call the under_warranty() method and print out the resulting boolean.
21. Finally, add both items the cart using add_items. Print out the new cart info.