| """Basit banka hesabı modeli.""" | |
| class InsufficientFunds(Exception): | |
| """Bakiye yetersiz olduğunda fırlatılır.""" | |
| class BankAccount: | |
| def __init__(self, owner: str, balance: float = 0.0, overdraft_limit: float = 0.0): | |
| if not owner or not owner.strip(): | |
| raise ValueError("owner boş olamaz") | |
| if balance < 0: | |
| raise ValueError("başlangıç bakiyesi negatif olamaz") | |
| if overdraft_limit < 0: | |
| raise ValueError("ek hesap limiti negatif olamaz") | |
| self.owner = owner.strip() | |
| self.balance = float(balance) | |
| self.overdraft_limit = float(overdraft_limit) | |
| self.history: list[tuple[str, float]] = [] | |
| def deposit(self, amount: float) -> float: | |
| if amount <= 0: | |
| raise ValueError("yatırılan tutar pozitif olmalı") | |
| self.balance += amount | |
| self.history.append(("deposit", amount)) | |
| return self.balance | |
| def withdraw(self, amount: float) -> float: | |
| if amount <= 0: | |
| raise ValueError("çekilen tutar pozitif olmalı") | |
| if self.balance - amount < -self.overdraft_limit: | |
| raise InsufficientFunds(f"{self.owner}: yetersiz bakiye") | |
| self.balance -= amount | |
| self.history.append(("withdraw", amount)) | |
| return self.balance | |
| def transfer(self, other: "BankAccount", amount: float) -> None: | |
| if other is self: | |
| raise ValueError("aynı hesaba transfer yapılamaz") | |
| self.withdraw(amount) | |
| other.deposit(amount) | |
| def apply_interest(self, rate: float) -> float: | |
| """Pozitif bakiyeye yıllık faiz uygular; negatif bakiyeye faiz uygulanmaz.""" | |
| if not 0 <= rate <= 1: | |
| raise ValueError("oran 0 ile 1 arasında olmalı") | |
| if self.balance > 0: | |
| interest = round(self.balance * rate, 2) | |
| self.balance += interest | |
| self.history.append(("interest", interest)) | |
| return self.balance | |
| def statement(self) -> str: | |
| lines = [f"Hesap sahibi: {self.owner}"] | |
| for kind, amount in self.history: | |
| sign = "-" if kind == "withdraw" else "+" | |
| lines.append(f"{kind:<9}{sign}{amount:.2f}") | |
| lines.append(f"Bakiye: {self.balance:.2f}") | |
| return "\n".join(lines) | |