"""Create fallback_executor
Generated by Phi-Octopus Eden
2025-11-08 16:40:26.342284
"""

```python
class FallbackExecutor:
    """
    A class for executing tasks with fallback mechanisms in case of errors.
    
    Args:
        primary_executor (callable): The main function to execute a task.
        secondary_executors (list[callable], optional): List of functions to try if the primary executor fails. Defaults to an empty list.

    Methods:
        run: Executes the task using the primary and, if necessary, secondary executors.
    """
    
    def __init__(self, primary_executor: callable, secondary_executors: list[callable] = []):
        self.primary_executor = primary_executor
        self.secondary_executors = secondary_executors
    
    def run(self, *args, **kwargs) -> any:
        """
        Attempts to execute the task using the primary executor. If an exception is raised,
        tries the next fallback executor until successful or no more executors are left.
        
        Args:
            *args: Positional arguments passed to the executors.
            **kwargs: Keyword arguments passed to the executors.

        Returns:
            The result of the last executed function if success, otherwise None.
        """
        try:
            return self.primary_executor(*args, **kwargs)
        except Exception as primary_error:
            # Try secondary executors in order
            for fallback_executor in self.secondary_executors:
                try:
                    return fallback_executor(*args, **kwargs)
                except Exception as fallback_error:
                    pass  # Keep trying the next one if available
            
            return None


# Example Usage:

def add(a: int, b: int) -> int:
    """Add two numbers."""
    return a + b

def subtract(a: int, b: int) -> int:
    """Subtract two numbers."""
    return a - b

def multiply(a: int, b: int) -> int:
    """Multiply two numbers."""
    return a * b


# Primary and fallback executors
primary_executor = add
secondary_executors = [subtract, multiply]

executor = FallbackExecutor(primary_executor, secondary_executors)

try_result = executor.run(10, 5)
print(f"Result: {try_result}")  # Expected to print "15"

except_result = executor.run(10, 'five')  # Raises an error
print(f"Excepted Result: None or Exception caught")  # Expected no exception, fallback mechanism tried and failed
```