Gen-AI Developer Classroom notes 06/Oct/2025

Object Oriented Programming

• An object can be anything with
  • contents
  • capabilities
• Examples
• Bank Account
  • contents
    • number
    • name
    • bank info
    • contact info
    • balance
  • capabilities:
    • withdraw
    • transfer
• Car
  • Contents:
    • engine
    • seats
    • make
  • capabilities:
    • commute
    • drive
• Contents become members and capabilities become methods (functions)
• In python

class BankAccount:

    def withdraw(amount: int):
        pass

    def transfer(amount: int, to: BankAccount):
        pass

• Class will have three types of methods
  • class methods
  • instance methods
  • static methods

• members will also be at levels

  • instance members
  • class members

• Objects can be related to each other, we have two major types of relationships

  • is-a (inheritence)
  • has-a (Composition)

Lets discuss object oriented library

• Library has a catalog
• Catalog will have books which you can
  • search by title
  • search by id
• Each Book can be loaned (Transaction)
• Loan will have
  • Person
  • Book

• Each Book will have a unique id by college

• Book:

  • contents:
    • title
    • isbn
    • author
    • genre
• Person:
  • content:
    • id
    • name
    • mobilenumber
    • email
  • capability:
    • loan
    • return
• Loan:
  • contents:
    • id
    • start_datetime
    • end_datetime
    • student

• Exercise: Try implementing inventory for grocery store.