"""Create fallback_executor
Generated by Phi-Octopus Eden
2025-11-06 17:16:52.972390
"""

```python
class FallbackExecutor:
    """
    A class for executing tasks with a fallback mechanism in case of errors.

    Attributes:
        task_func (Callable): The function to execute.
        fallback_func (Callable): The function to execute if `task_func` fails.

    Methods:
        run: Executes the task and handles exceptions by falling back to an alternative function.
    """

    def __init__(self, task_func: callable, fallback_func: callable):
        self.task_func = task_func
        self.fallback_func = fallback_func

    def run(self) -> None:
        """
        Execute `task_func`. If an exception occurs during its execution,
        `fallback_func` is executed instead.

        Example usage:

        >>> from math import sqrt
        >>> def safe_sqrt(x: float) -> float:
        ...     return sqrt(x)
        ...
        >>> def error_func() -> None:
        ...     raise ValueError("Something went wrong!")
        ...
        >>> task = FallbackExecutor(task_func=safe_sqrt, fallback_func=error_func)
        >>> task.run()
        2.0
        """
        try:
            result = self.task_func()
            print(f"Task completed successfully: {result}")
        except Exception as e:
            print(f"Error occurred in the main function: {e}")
            result = self.fallback_func()
            print(f"Falling back to fallback function: {result}")

# Example usage
if __name__ == "__main__":
    from math import sqrt

    def safe_sqrt(x: float) -> float:
        return sqrt(x)

    def error_func() -> None:
        raise ValueError("Something went wrong!")

    task = FallbackExecutor(task_func=safe_sqrt, fallback_func=error_func)
    task.run()
```

This Python code defines a class `FallbackExecutor` that provides a mechanism to handle errors by providing a fallback function. The example usage demonstrates how the main function can fall back to an error-handling function when exceptions occur.