"""Create fallback_executor
Generated by Phi-Octopus Eden
2025-11-06 15:28:20.454353
"""

```python
from typing import Callable, Optional


class FallbackExecutor:
    """
    A class for creating a fallback mechanism in function execution.
    
    This allows defining a main function to execute along with its error handler,
    and a fallback function that will be executed if the main function raises an exception.
    
    :param main_function: The primary function to attempt executing
    :type main_function: Callable[..., Any]
    :param fallback_function: An optional secondary function to use as a fallback in case of errors
    :type fallback_function: Optional[Callable[..., Any]]
    """
    
    def __init__(self, main_function: Callable[..., Any], fallback_function: Optional[Callable[..., Any]] = None):
        self.main_function = main_function
        self.fallback_function = fallback_function
    
    def execute(self) -> Any:
        """
        Executes the main function and handles any exceptions by invoking the fallback function if provided.
        
        :return: The result of the main function or fallback function, depending on success or failure
        :rtype: Any
        """
        try:
            return self.main_function()
        except Exception as e:
            if self.fallback_function is not None:
                print(f"Main function failed with error: {e}. Executing fallback function.")
                return self.fallback_function()
            else:
                raise


# Example usage:

def main_function() -> int:
    """
    A sample main function that may fail.
    
    :return: An integer value
    """
    try:
        # Simulate an error condition by dividing by zero
        result = 10 / 0
    except ZeroDivisionError as e:
        raise ValueError("Simulated error: division by zero") from e
    
    return result


def fallback_function() -> int:
    """
    A sample fallback function that returns a default value.
    
    :return: An integer value
    """
    print("Executing fallback function due to an error in main function.")
    return 42


if __name__ == "__main__":
    # Create a FallbackExecutor instance with both the main and fallback functions
    executor = FallbackExecutor(main_function, fallback_function)
    
    # Execute the wrapped functions using the execute method
    try:
        result = executor.execute()
        print(f"Result from main function: {result}")
    except Exception as e:
        print(f"Error executing fallback: {e}")

    # Attempt to execute again without a fallback, expecting an exception
    try:
        empty_executor = FallbackExecutor(main_function)
        empty_executor.execute()
    except ValueError as e:
        print(f"Caught expected error with no fallback: {e}")
```