将装饰器应用于访问类属性的类方法

def access_control(allowed_roles):
    def decorator(func):
        def wrapper(self, *args, **kwargs):
            if self.role in allowed_roles:
                return func(self, *args, **kwargs)
            else:
                raise PermissionError(f"User with role {self.role} is not allowed to access this method.")
        return wrapper
    return decorator

class MyClass:
    def __init__(self, role):
        self.role = role
        self._sensitive_data = "This is sensitive data."

    @access_control(allowed_roles=['admin'])
    def get_sensitive_data(self):
        return self._sensitive_data

# 使用示例
user1 = MyClass(role='admin')
print(user1.get_sensitive_data())  # 输出: This is sensitive data.

user2 = MyClass(role='guest')
try:
    print(user2.get_sensitive_data())
except PermissionError as e:
    print(e)  # 输出: User with role guest is not allowed to access this method.

from functools import wraps

def access_control(allowed_roles):
    def decorator(func):
        @wraps(func)
        def wrapper(self, *args, **kwargs):
            if self.role in allowed_roles:
                return func(self, *args, **kwargs)
            else:
                raise PermissionError(f"User with role {self.role} is not allowed to access this method.")
        return wrapper
    return decorator