Shopping List App¶

Build a simple shopping list application that helps users keep track of items they need to buy. This assignment will practice lists, functions, and user interaction.

Core Requirements¶

Your shopping list app must have these features:

Part 1: Basic Functions¶

Write the following functions:

display_list(shopping_list) - Shows all items in the list

# Example output:
Shopping List:
1. Milk
2. Bread
3. Eggs

add_item(shopping_list, item) - Adds an item to the list
- Don't add duplicates (check if item already exists)
- Return True if added, False if duplicate
remove_item(shopping_list, item_number) - Removes item by position
- Remember: display shows 1-based numbers, but lists are 0-indexed!
- Return True if removed, False if invalid number

Part 2: Main Program¶

Create a menu-driven program:

=== SHOPPING LIST MANAGER ===
1. View list
2. Add item
3. Remove item
4. Clear list
5. Exit

Enter choice:

Requirements:

The program should loop until user chooses to exit
Handle invalid menu choices gracefully
Start with an empty list

Sample Interaction¶

=== SHOPPING LIST MANAGER ===
1. View list
2. Add item
3. Remove item
4. Clear list
5. Exit

Enter choice: 2
Enter item to add: Milk
Added "Milk" to your list!

Enter choice: 2
Enter item to add: Bread
Added "Bread" to your list!

Enter choice: 1

Shopping List:
1. Milk
2. Bread

Enter choice: 3
Enter item number to remove: 1
Removed "Milk" from your list!

Enter choice: 5
Goodbye!

Bonus Features¶

Level 1: Enhanced Features¶

Add mark_purchased(shopping_list, item_number) to mark items as bought
- Display purchased items with ✓ or [X]
- Keep them in the list but show they're done
Add item quantities (e.g., "Milk (2 gallons)")
Sort list alphabetically

Level 2: Categories¶

Organize items by category (Produce, Dairy, Meat, etc.)
Display items grouped by category
Add category when adding items

In [ ]:

def display_list(shopping_list):
    """Display all items in the shopping list"""
    # TODO: Your code here
    pass

def add_item(shopping_list, item):
    """Add item to list if not duplicate"""
    # TODO: Your code here
    pass

def remove_item(shopping_list, item_number):
    """Remove item at given position"""
    # TODO: Your code here
    pass

def main():
    shopping_list = []

    while True:
        print("\n=== SHOPPING LIST MANAGER ===")
        print("1. View list")
        print("2. Add item")
        print("3. Remove item")
        print("4. Clear list")
        print("5. Exit")

        choice = input("\nEnter choice: ")

        # TODO: Handle each choice

# Run the program
main()