README.md

Grocery List

This Python program is an implementation to CS50’s Introduction to Programming with Python Week 3 - Grocery List Problem Set, named grocery.py, helps you organize your grocery list by counting the occurrences of each item, sorting them alphabetically, and displaying the results. The program prompts the user to input grocery items, one per line, until the user inputs Ctrl-D (or Ctrl-Z on Windows) to signal the end of input. After processing the input, the program displays each item's count and the item itself in uppercase, sorted alphabetically.

How to Run the Program

1. Open your terminal.

2. Navigate to the directory where you have saved the grocery.py file.

   cd path/to/your/directory
   

3. Run the program using the Python interpreter:

   python grocery.py
   

4. The program will prompt you to enter grocery items one by one. After each input, it will process the input and keep track of the item counts.

5. When you're done entering items, press Ctrl-D (or Ctrl-Z on Windows) to signal the end of input. The program will display the organized grocery list.

Program Code

# grocery.py

def main():
    groceries = {}
    
    while True:
        try:
            item = input()
            if item.capitalize() not in groceries:
                groceries[item.capitalize()] = 1
            else:
                groceries[item.capitalize()] += 1
        except EOFError:
            print()
            sorted_items = sorted(groceries.items())
            for item, count in sorted_items:
                print(f"{count} {item.upper()}")
            break


if __name__ == "__main__":
    main()

How to Test

1. Run the program as mentioned in the "How to Run the Program" section.
2. Follow the prompts to enter various grocery items. Make sure to test both upper and lower case inputs, as well as mixed case inputs.
3. After processing the input, the program will display each item's count and the item itself in uppercase, sorted alphabetically.
4. When you're done entering items, press Ctrl-D (or Ctrl-Z on Windows) to signal the end of input. The program will display the organized grocery list.

Sample Test Cases

1. Input:

   mango
   strawberry
   

   Result:

   1 MANGO
   1 STRAWBERRY
   

2. Input:

   milk
   milk
   

   Result:

   2 MILK
   

3. Input:

   tortilla
   sweet potato
   

   Result:

   1 SWEET POTATO
   1 TORTILLA
   

Additional Notes

Make sure to save the grocery.py file in the same directory where you are running the program. If you encounter any issues with the program not being found or not running as expected, ensure you are in the correct directory and have saved the file with the correct name.