Python Classroom notes 17/Mar/2026

Point of Sale

• This will be very basic version of point of sale
• We will have two options
  • Sale
  • Inventory
• We will not be storing any thing permanently
• Topics:
  • datatypes
  • loops
  • conditional statements
  • functions
  • list and dictionary comprehensions

Creating a new python project

• Create a new folder lt_pos
• cd in to the folder and create two files Readme.md and main.py
• Refer Here for markdown

Basic Menu to the user

• The Application when execute will give basic menu

===== LT POS =====

1. Sale
2. Inventory
3. Exit

Select an option:

• Refer Here for the changes

Support inventory

• Our inventory item will be identified by a unique id and for every item we will have
  • id
  • name
  • description
  • price
• A sample item

{
    "id": "1",
    "name": "Ambika Darbar Agarbathi",
    "description": "",
    "price": 25,
    "quantity": 100
}

• An item is a dictionary and since we have mulitple items in inventory, inventory will be list of dictionaries
• Refer Here for inventory changes
• Exercise: try implementing delete_item