"""Create fallback_executor
Generated by Phi-Octopus Eden
2025-11-08 04:22:52.952017
"""

```python
class FallbackExecutor:
    """
    A class for executing tasks with fallback mechanisms in case of errors.
    
    Attributes:
        primary_executor (callable): The main function to execute a task.
        secondary_executors (list[callable]): List of backup functions to try if the primary executor fails.
        
    Methods:
        execute: Attempts to run the task using the primary executor and falls back to secondary executors if necessary.
    """
    
    def __init__(self, primary_executor: callable, secondary_executors: list = None):
        self.primary_executor = primary_executor
        self.secondary_executors = secondary_executors or []
        
    def execute(self, *args, **kwargs) -> any:
        """
        Attempts to run the task with the primary executor. If it fails, tries the secondary executors.
        
        Args:
            *args: Variable length argument list passed to the executors.
            **kwargs: Arbitrary keyword arguments passed to the executors.
            
        Returns:
            The result of the successfully executed function or None if all attempts fail.
        """
        try:
            return self.primary_executor(*args, **kwargs)
        except Exception as e:
            print(f"Primary executor failed with error: {e}")
            
            for fallback in self.secondary_executors:
                try:
                    return fallback(*args, **kwargs)
                except Exception as fe:
                    print(f"Fallback executor {fallback} failed with error: {fe}")
                    
            print("All fallback executors failed.")
            return None

# Example usage
def primary_task(x):
    """A simple task that may fail due to invalid input."""
    if x < 0:
        raise ValueError("Negative value not allowed")
    return x * x

def secondary_task_1(x):
    """Fallback task for positive values."""
    print("Executing secondary task 1.")
    return -x * -x

def secondary_task_2(x):
    """Another fallback task for handling errors."""
    print("Executing secondary task 2.")
    return abs(x) * abs(x)

# Create FallbackExecutor instance
executor = FallbackExecutor(primary_task, [secondary_task_1, secondary_task_2])

# Test the example usage
result = executor.execute(5)
print(f"Result: {result}")
try:
    result = executor.execute(-3)
except Exception as e:
    print(f"Error during execution: {e}")
finally:
    print("Execution completed.")
```