class FinancialDistress:
    """
    #### A class representing a financially distressed object that checks whether a company or individual is facing financial difficulties.
    - Declining financial performance: Companies or individuals facing financial distress often exhibit declining financial performance, including decreasing revenues, rising expenses, and shrinking profit margins.

    - High debt burden: Financially distressed companies or individuals often have a high debt burden and may struggle to make interest or principal payments on their debts.

    - Insufficient liquidity: Financially distressed entities may have insufficient liquidity to meet their financial obligations, including paying their bills and meeting payroll.

    - Legal issues: Financially distressed entities may be facing legal issues, such as lawsuits or regulatory violations, that further complicate their financial situation.  
    Args:
        - revenue (float): The revenue generated by the company or individual.
        - expenses (float): The expenses incurred by the company or individual.
        - profit_margin (float): The profit margin of the company or individual.
        - debt (float): The amount of debt owed by the company or individual.
        - liquidity_ratio (float): The liquidity ratio of the company or individual.
        - legal_issues (bool): Whether the company or individual is facing legal issues.

    Attributes:
        - is_financially_distressed (bool): Whether the company or individual is financially distressed.
    """

    def __init__(self, independent, revenue, expenses, profit_margin, debt, liquidity_ratio, legal_issues):
        self.revenue = revenue
        self.expenses = expenses
        self.profit_margin = profit_margin
        self.debt = debt
        self.liquidity_ratio = liquidity_ratio
        self.legal_issues = legal_issues
        self.is_financially_distressed = False
        self._independent = independent
        self._independent.attach(self)
        self._dependents = []
    def attach(self, dependent):
        self._dependents.append(dependent)
    def detach(self, dependent):
        self._dependents.remove(dependent)
    def notify(self):
        for dependent in self._dependents:
            dependent.update()
    def update(self):
        # 观察者收到通知后需要执行的操作
        print("Received notification from subject.")
    def check_financial_distress(self):
        """
        Checks whether the company or individual is financially distressed.

        Returns:
            bool: True if the company or individual is financially distressed, otherwise False.
        """
        if self.legal_issues:
            self.is_financially_distressed = True
        elif self.revenue < self.expenses or self.profit_margin < 0 or self.debt > self.revenue or self.liquidity_ratio < 1:
            self.is_financially_distressed = True
        return self.is_financially_distressed
