Python 3 Deep Dive Part 4 Oop High Quality [better] May 2026

rectangle = Rectangle(4, 5) circle = Circle(3)

class PayPalPaymentGateway(PaymentGateway): def process_payment(self, amount): print(f"Processing payment of ${amount} using PayPal.") python 3 deep dive part 4 oop high quality

class BankAccount: def __init__(self, account_number, balance): self.__account_number = account_number self.__balance = balance rectangle = Rectangle(4, 5) circle = Circle(3) class