import csv

with open("large_data.csv", "r") as file:
    reader = csv.reader(file)
    for row in reader:
        process = row  # Lazy iteration prevents memory overload

class BankAccount:
    def __init__(self, owner, balance):
        self.owner = owner
        self.balance = balance

    def deposit(self, amount):
        self.balance += amount

    def withdraw(self, amount):
        self.balance -= amount

account = BankAccount("Alice", 1000)
account.deposit(500)
print(account.balance)  # Output: 1500

1500

class Vehicle:
    def start(self):
        print("Vehicle started")

class Car(Vehicle):
    def drive(self):
        print("Car is driving")

class Bike(Vehicle):
    def ride(self):
        print("Bike is riding")

car = Car()
bike = Bike()

car.start()
car.drive()

bike.start()
bike.ride()

Vehicle started
Car is driving
Vehicle started
Bike is riding …

class Logger:
    def log(self):
        print("Logging data")

class Validator:
    def validate(self):
        print("Validating data")

class Service(Logger, Validator):
    def execute(self):
        self.log()
        self.validate()
        print("Executing service")

service = Service()
service.execute()

Logging data
Validating data
Executing service

class Notification:
    def send(self):
        print("Sending notification")

class Email(Notification):
    def send(self):
        print("Sending Email")

class SMS(Notification):
    def send(self):
        print("Sending SMS")

def notify(service):
    service.send()

notify(Email())
notify(SMS())

Sending Email
Sending SMS

def infinite_recursion():
    return infinite_recursion()

# infinite_recursion()  # Raises RecursionError

def factorial_iterative(n):
    result = 1
    for i in range(1, n + 1):
        result *= i
    return result

print(factorial_iterative(5))  # 120

120

def fibonacci(n):
    if n <= 1:
        return n
    return fibonacci(n - 1) + fibonacci(n - 2)

print(fibonacci(6)) 

8

def reverse_string(text):
    if len(text) == 0:
        return text
    return reverse_string(text[1:]) + text[0]

print(reverse_string("Python"))  # Output: nohtyP

nohtyP

def sum_n(n):
    if n == 1:
        return 1
    return n + sum_n(n - 1)

print(sum_n(5))  # Output: 15

15