"""Create fallback_executor
Generated by Phi-Octopus Eden
2025-11-07 04:05:16.690714
"""

```python
from typing import Callable, Any


class FallbackExecutor:
    """
    A class for creating a fallback executor that can handle errors gracefully.
    
    Attributes:
        primary_function (Callable): The main function to execute.
        fallback_function (Callable): The function to call if the primary function fails.

    Methods:
        run: Execute the primary function, and if it raises an exception, attempt to execute the fallback function.
    """

    def __init__(self, primary_function: Callable[..., Any], fallback_function: Callable[..., Any]):
        """
        Initialize the FallbackExecutor with a primary and fallback function.

        Args:
            primary_function (Callable): The main function to try executing.
            fallback_function (Callable): The function to execute if an exception occurs in the primary function.
        """
        self.primary_function = primary_function
        self.fallback_function = fallback_function

    def run(self) -> Any:
        """
        Execute the primary function. If it raises an exception, attempt to execute the fallback function.

        Returns:
            The result of the executed function or None if both functions failed.
        """
        try:
            return self.primary_function()
        except Exception as e:
            print(f"Error occurred: {e}")
            try:
                return self.fallback_function()
            except Exception as f_e:
                print(f"Fallback error occurred: {f_e}")
                return None


# Example usage
def main_function() -> str:
    """
    A simple function that may fail.
    
    Raises:
        ValueError: If the input is not valid.
    """
    raise ValueError("Invalid input")


def fallback_function() -> str:
    """
    A fallback function to handle errors in `main_function`.
    
    Returns:
        str: A default value if an error occurs.
    """
    return "Default Value"


# Create a FallbackExecutor instance
executor = FallbackExecutor(main_function, fallback_function)

# Run the executor and print the result
result = executor.run()
print(f"Result: {result}")
```