Write a Python program that implements a basic login functionality for a MoneyDashboard application. You need to implement a custom exception class called `LoginFailedException` and a class called `MoneyDashboard` with the following attributes and method:

Attributes:
- `_email` (str): The email of the user.
- `_password` (str): The password of the user.
- `_request_verification_token` (str): The verification token requested by the user.

Methods:
- `__init__(self, email, password, session=None)`: Initializes a new instance of the `MoneyDashboard` class with the provided `email` and `password`. The optional `session` parameter represents an active session.

Your task is to implement the `MoneyDashboard` class and the `LoginFailedException` class. The `MoneyDashboard` class should have the following behavior:

1. When a new instance of `MoneyDashboard` is created, the `email` and `password` are stored in the corresponding attributes.
2. The `session` attribute is set to the provided session or `None` if not provided.
3. The `_request_verification_token` attribute is initialized to `None`.

The `LoginFailedException` class is already implemented and inherits from the `MoneyDashboardException` class. You do not need to implement any additional methods for the `LoginFailedException` class.
user
Sure, I can help you with that. Here's a simple implementation of the `MoneyDashboard` and `LoginFailedException` classes in Python:

```python
class MoneyDashboardException(Exception):
    """
    Base class for all MoneyDashboard exceptions.
    """

class LoginFailedException(MoneyDashboardException):
    """
    Raised when a login attempt fails.
    """

class MoneyDashboard:
    def __init__(self, email, password, session=None):
        self._email = email
        self._password = password
        self._request_verification_token = None
        self.session = session

    def login(self):
        """
        Trigger login functionality.

        Raises:
            LoginFailedException: If the login fails.
        """
        # Pseudo code for login functionality.
        response = requests.post('https://www.moneydashboard.com/login', data={
            'email': self._email,
            'password': self._password,
        })

        # Check the response status.
        if response.status_code != 200:
            raise LoginFailedException("Login failed, response status code: {}".format(response.status_code))

        # Extract the verification token from the response.
        soup = BeautifulSoup(response.content, 'html.parser')
        token_input = soup.find('input', type_='hidden', name_='_request_verification_token')
        self._request_verification_token = token_input['value'] if token_input else None
```

This implementation assumes that you're using the `requests` library to perform the login. You would modify `login()` to your actual login functionality. The `session` attribute is included in the constructor, but it's not used in this implementation since the `login()` method doesn't use it.
assistant
Write a Python program that implements a basic login functionality for a MoneyDashboard application. You need to implement a custom exception class called `LoginFailedException` and a class called `MoneyDashboard` with the following attributes and method:

Attributes:
- `_email` (str): The email of the user.
- `_password` (str): The password of the user.
- `_request_verification_token` (str): The verification token requested by the user.

Methods:
- `__init__(self, email, password, session=None)`: Initializes a new instance of the `MoneyDashboard` class with the provided `email` and `password`. The optional `session` parameter represents an active session.

Your task is to implement the `MoneyDashboard` class and the `LoginFailedException` class. The `MoneyDashboard` class should have the following behavior:

1. When a new instance of `MoneyDashboard` is created, the `email` and `password` are stored in the corresponding attributes.
2. The `session` attribute is set to the provided session or `None` if not provided.
3. The `_request_verification_token` attribute is initialized to `None`.

The `LoginFailedException` class is already implemented and inherits from the `MoneyDashboardException` class. You do not need to implement any additional methods for the `LoginFailedException` class.
user
Sure, I can help you with that. Here's a basic implementation of the `MoneyDashboard` class and the `LoginFailedException` class in Python:

```python
class MoneyDashboardException(Exception):
    pass

class LoginFailedException(MoneyDashboardException):
    pass

class MoneyDashboard:
    def __init__(self, email, password, session=None):
        self._email = email
        self._password = password
        self._session = session if session else None
        self._request_verification_token = None
```

In this code:

1. `MoneyDashboardException` is a custom exception class that inherits from Python's built-in `Exception` class.
2. `LoginFailedException` is a subclass of `MoneyDashboardException`.
3. `MoneyDashboard` is a class with attributes `_email`, `_password`, `_session`, and `_request_verification_token`. The `__init__` method is used to initialize these attributes when a new instance of the class is created. The `_session` attribute is set to the provided session or `None` if not provided, and `_request_verification_token` is initialized to `None`.
assistant