Python Classes and OOP With AI

from dataclasses import dataclass, field

@dataclass
class Account:
    owner: str
    balance: float = 0.0
    history: list[str] = field(default_factory=list)

    def deposit(self, amount: float) -> None:
        if amount <= 0:
            raise ValueError("amount must be positive")
        self.balance += amount
        self.history.append(f"+{amount:.2f}")

    def withdraw(self, amount: float) -> None:
        if amount > self.balance:
            raise ValueError("insufficient funds")
        self.balance -= amount
        self.history.append(f"-{amount:.2f}")

acc = Account("Ada")
acc.deposit(100)
acc.withdraw(30)
print(acc.balance, acc.history)

@dataclass
class SavingsAccount(Account):
    rate: float = 0.02

    def accrue(self) -> None:
        interest = self.balance * self.rate
        self.deposit(interest)

s = SavingsAccount("Bo", balance=1000.0)
s.accrue()
print(s.balance)  # 1020.0