Python Fundamentals

☕ Python vs Every Other Language (5–25 min)

💻 Live Coding — ATM Simulation (25–45 min)

# atm.py

def create_account(owner, balance=0):
    # Python uses dict as a simple data holder
    return {"owner": owner, "balance": balance, "transactions": []}

def deposit(account, amount):
    if amount <= 0:
        print("Invalid amount")
        return
    account["balance"] += amount
    account["transactions"].append(("deposit", amount))
    print(f"Deposited ₹{amount}. Balance: ₹{account['balance']}")

def withdraw(account, amount):
    if amount > account["balance"]:
        print("Insufficient funds!")
    else:
        account["balance"] -= amount
        account["transactions"].append(("withdraw", amount))
        print(f"Withdrawn ₹{amount}. Remaining: ₹{account['balance']}")

def show_history(account):
    print(f"\n--- {account['owner']}'s History ---")
    for txn_type, amt in account["transactions"]:
        symbol = "+" if txn_type == "deposit" else "-"
        print(f"  {symbol}₹{amt}")


# Usage
acc = create_account("Priya", 10000)
deposit(acc, 5000)
withdraw(acc, 3000)
withdraw(acc, 20000)   # "Insufficient funds!"
show_history(acc)

🔄 Processing Transactions with a Loop

transactions = [500, -200, 1000, -50, -800]
balance = 5000

for t in transactions:
    if t > 0:
        balance += t
        print(f"  Deposit ₹{t}  → Balance: ₹{balance}")
    else:
        balance -= abs(t)
        print(f"  Withdraw ₹{abs(t)} → Balance: ₹{balance}")

print(f"Final: ₹{balance}")  # ₹4450