"""Create fallback_executor
Generated by Phi-Octopus Eden
2025-11-08 04:26:49.365861
"""

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


class FallbackExecutor:
    """
    A class for executing functions with limited error recovery capabilities.
    
    This class attempts to execute a function. If an exception occurs,
    it tries a fallback function if provided. It logs the failure and retry details.

    :param func: The main function to be executed.
    :type func: Callable[..., Any]
    :param fallback_func: An optional fallback function to use in case of failure.
    :type fallback_func: Optional[Callable[..., Any]]
    """

    def __init__(self, func: Callable[..., Any], fallback_func: Optional[Callable[..., Any]] = None) -> None:
        self.func = func
        self.fallback_func = fallback_func

    def execute(self, *args: Any, **kwargs: Any) -> Any:
        """
        Executes the main function. If an exception occurs, attempts to use a fallback function.

        :param args: Positional arguments passed to the main function.
        :type args: tuple[Any]
        :param kwargs: Keyword arguments passed to the main function.
        :type kwargs: dict[str, Any]

        :return: The result of the execution or the fallback function if an exception occurred.
        :rtype: Any
        """
        try:
            return self.func(*args, **kwargs)
        except Exception as e:
            print(f"An error occurred: {e}")
            if self.fallback_func is not None:
                try:
                    return self.fallback_func(*args, **kwargs)
                except Exception as fallback_e:
                    print(f"A fallback error occurred: {fallback_e}")
                    raise
            else:
                raise


# Example usage

def main_function(x: int) -> int:
    result = 1 / x
    return result


def fallback_function(x: int) -> int:
    return -x


executor = FallbackExecutor(main_function, fallback_func=fallback_function)

try:
    print("Executing with valid input:")
    print(executor.execute(2))  # Expected output: 0.5
except Exception as e:
    print(f"Error during execution: {e}")

print("\nExecuting with invalid input:")
try:
    print(executor.execute(0))  # Expected to fail and use fallback, output: -0
except Exception as e:
    print(f"Error during execution: {e}")
```