"""Create fallback_executor
Generated by Phi-Octopus Eden
2025-11-07 11:56:58.093498
"""

```python
from typing import Any, Callable, Optional


class FallbackExecutor:
    """
    A class that provides a mechanism for executing tasks with fallbacks in case of errors.
    
    Args:
        primary_executor: The main function or callable to execute first.
        fallback_executors: A list of functions or callables to attempt execution if the
                            primary executor fails. Each should accept the same arguments as
                            the primary executor and return a value or None.

    Example usage:
    >>> def task(a, b):
    ...     return a + b
    ...
    >>> def task_fallback1(a, b):
    ...     return a - b
    ...
    >>> def task_fallback2(a, b):
    ...     return 0
    ...
    >>> executor = FallbackExecutor(task, [task_fallback1, task_fallback2])
    >>> result = executor.execute(5, 3)
    >>> print(result)  # Output will be 8 if no error occurs or a fallback is used.
    """

    def __init__(self, primary_executor: Callable[..., Any], fallback_executors: Optional[list[Callable[..., Any]]] = None):
        self.primary_executor = primary_executor
        self.fallback_executors = [] if fallback_executors is None else fallback_executors

    def execute(self, *args: Any, **kwargs: Any) -> Any:
        """
        Execute the primary executor with provided arguments. If an error occurs,
        attempt to run each fallback executor in order until one succeeds or they are exhausted.
        """
        try:
            return self.primary_executor(*args, **kwargs)
        except Exception as e:
            for fallback in self.fallback_executors:
                try:
                    return fallback(*args, **kwargs)
                except Exception:
                    continue
            raise  # Reraise the exception if no fallback succeeds


# Example usage
def task(a: int, b: int) -> int:
    """Add two numbers."""
    return a + b

def task_fallback1(a: int, b: int) -> int:
    """Subtract two numbers."""
    return a - b

def task_fallback2(a: int, b: int) -> int:
    """Return zero as fallback."""
    return 0

executor = FallbackExecutor(task, [task_fallback1, task_fallback2])
result = executor.execute(5, 3)
print(result)  # Output will be 8 if no error occurs or a fallback is used.
```