Create Lightweight Data Objects with Python Namedtuple

from collections import namedtuple

# Define a namedtuple for representing API response data (e.g., a product)
Product = namedtuple('Product', ['id', 'name', 'price', 'category'])

# Define a namedtuple for representing user session data
SessionInfo = namedtuple('SessionInfo', ['user_id', 'timestamp', 'ip_address'])

def fetch_product_details(product_id):
    """
    Simulates fetching product details and returning them as a namedtuple.
    """
    # In a real app, this would query a database or external API
    if product_id == 101:
        return Product(id=101, name="Wireless Mouse", price=25.99, category="Electronics")
    return None

def create_session(user_id, ip_address):
    """
    Creates a session info record using namedtuple.
    """
    import datetime
    return SessionInfo(user_id=user_id, timestamp=datetime.datetime.now(), ip_address=ip_address)

# Example usage for a web application scenario
product = fetch_product_details(101)
if product:
    print(f"Product Name: {product.name}, Price: ${product.price:.2f}")
    # Access by index also works: print(product[1])
    # namedtuples are immutable: product.price = 30.00 # This would raise an AttributeError

session = create_session(user_id=42, ip_address="192.168.1.100")
print(f"User {session.user_id} logged in from {session.ip_address} at {session.timestamp}")