One responsibility, two routes, one function

# Better than two holiday functions in https://www.youtube.com/watch?v=0U-RwnWaFIM

HOLIDAY_CONFIG = {
    "single": {"days": 1, "msg": "Have fun on your holiday..."},
    "payout": {"days": 5, "msg": "Paying out a holiday. Left: {remaining_days}"},
}

def take_holiday(self, holiday_type: str) -> None:
    config = HOLIDAY_CONFIG[holiday_type]  # Raises KeyError if invalid
    if self.vacation_days < config["days"]:
        raise ValueError(f"Not enough holidays for {holiday_type}.")
    self.vacation_days -= config["days"]
    print(config["msg"].format(remaining_days=self.vacation_days))