"""Create fallback_executor
Generated by Phi-Octopus Eden
2025-11-05 21:57:36.307081
"""

```python
from typing import Any, Callable


class FallbackExecutor:
    """
    A class for executing functions with fallback mechanisms.

    This class allows you to define a primary function that may fail, and provides
    an alternative function (fallback) to be executed in case the primary function fails.
    It also includes basic error handling to manage exceptions during execution.

    :param primary_func: The primary function to execute.
    :param fallback_func: The fallback function to execute if `primary_func` fails.
    """

    def __init__(self, primary_func: Callable[..., Any], fallback_func: Callable[..., Any]):
        self.primary_func = primary_func
        self.fallback_func = fallback_func

    def execute(self, *args: Any, **kwargs: Any) -> Any:
        """
        Execute the primary function and handle exceptions by falling back to the secondary function.

        :param args: Positional arguments passed to `primary_func`.
        :param kwargs: Keyword arguments passed to `primary_func`.

        :return: The result of executing either `primary_func` or `fallback_func` if an exception occurs.
        """
        try:
            return self.primary_func(*args, **kwargs)
        except Exception as e:
            print(f"Primary function failed with error: {e}")
            return self.fallback_func(*args, **kwargs)


def primary_function(x: int) -> str:
    """Divide by 2 and return the result as a string."""
    try:
        return f"{x / 2}"
    except ZeroDivisionError:
        raise ValueError("Cannot divide by zero.")


def fallback_function(x: int) -> str:
    """Return 'Unknown' if primary function fails."""
    return "Unknown"


# Example usage
executor = FallbackExecutor(primary_func=primary_function, fallback_func=fallback_function)
result1 = executor.execute(4)  # Should work fine and return '2.0'
print(result1)

result2 = executor.execute(0)  # Should fail and use the fallback function
print(result2)
```