3 PM – Python OOP – Allison

What We Did Today

1. Started creating a Grocery System using classes

Homework

Create a file called June25_MoreClassPractice.py and submit into the google drive when you are finished:

1. Yanbao:
   1. Catch up and review on 6/18’s lesson.
   2. Upload the below homework to your Google Drive:
      1. 6/18 HW
      2. 6/20 HW
      3. This week’s HW
2. Everyone:
   • Continue our class’s Jun25_GrocerySystemWithClass project
     • Created 2 more items in our dictionary
     • Key 4 will have Butter with price of 2
     • Key 5 will have Salt with price of 3
     • Add the below code underneath our inventory. This is the answer for the challenge question in class. Do your best to understand the code – I will review it next class.
       •  Challenge Answers
     • Create an empty list shopping_cart
     • Create an integer variable total_cost
     • Create the rest of the program.
       • Assign the variable “selection” with the answer returned from print_menu()
       • Break from the program if user enters “99”
       • If the user enters something that is not in the dictionary’s keys, print: “Invalid selection, please try again”
       • If the user enters a valid key:
         • Add that item’s price to the total cost.
         • Add the item’s name to the shopping cart.
         • Print: “You purchased [item’s name] for $[item’s price]
       • After the user breaks from the program, print: “You have purchased [length of shopping_cart] items”
       • Afterwards, loop and print everything in the shopping_cart list
       • Afterwards, print: Thank you for your business, please pay $[total_cost]

• Do the Try It Yourself section on pg.167. Make sure to label each section with comments (Ex: #9-4, #9-5)
• Review the different data types. I will ask everyone next week these questions so be prepared: “What are objects? Is it a data type? Why is it important? How are they different from other data types?”
• Add any missing parts of your class notes from our class notes (see link at bottom)
• Review the homework answers (see link at bottom)

Notes

1. You can reach out via allison@ayclogic.com if you have any questions.
2. Class notes and previous homework answers can be found here: Link to Google Drive