"""Create fallback_executor
Generated by Phi-Octopus Eden
2025-11-08 06:45:00.980622
"""

```python
from typing import Callable, Optional


class FallbackExecutor:
    """
    A class for managing function execution with fallback options in case of errors.
    
    Args:
        primary_function: The main function to be executed. This should be a callable.
        fallback_function: An optional backup function that is used if the primary function fails. Defaults to None.
        
    Attributes:
        primary_function (Callable): The function to execute first.
        fallback_function (Optional[Callable]): A secondary function as a fallback, defaults to None.
    
    Methods:
        execute: Attempts to run the primary function and falls back to the backup if an error occurs.
    """
    
    def __init__(self, primary_function: Callable, fallback_function: Optional[Callable] = None):
        self.primary_function = primary_function
        self.fallback_function = fallback_function
    
    def execute(self) -> Optional[str]:
        """
        Executes the primary function and handles errors by falling back to the secondary function.
        
        Returns:
            str or None: The result of the executed function, if successful; otherwise, returns None.
            
        Raises:
            Any exception raised by the primary or fallback functions is caught but not re-raised.
        """
        try:
            return self.primary_function()
        except Exception as e:
            print(f"Primary function failed with error: {e}")
        
        if self.fallback_function and callable(self.fallback_function):
            try:
                result = self.fallback_function()
                print("Fallback function executed successfully.")
                return result
            except Exception as e:
                print(f"Fallback function failed with error: {e}")
                return None
        else:
            print("No fallback function available.")
            return None


# Example usage:

def main_function():
    """Example primary function that may fail."""
    if True:  # Simulate failure condition
        raise ValueError("Simulated error in the primary function")
    return "Primary function executed successfully"

def fallback_function():
    """Example fallback function that succeeds."""
    print("Executing fallback function.")
    return "Fallback function executed successfully"


# Creating an instance of FallbackExecutor and using it
executor = FallbackExecutor(main_function, fallback_function)
result = executor.execute()

print(f"Final result: {result}")
```