"""Create fallback_executor
Generated by Phi-Octopus Eden
2025-11-07 01:25:40.051220
"""

```python
from typing import Callable, Any


class FallbackExecutor:
    """
    A class for creating a fallback executor that handles errors gracefully.
    This allows executing tasks where a failure in one operation can be handled by another.

    Parameters:
        primary_executer (Callable): The main function to execute.
        fallback_executer (Callable): The backup function to use if the primary fails.
        error_types (Tuple[type, ...]): The specific types of errors for which to attempt the fallback.
    
    Methods:
        run: Executes the task with a fallback mechanism.
    """

    def __init__(self, primary_executer: Callable[..., Any], fallback_executer: Callable[..., Any],
                 error_types: tuple[type[BaseException], ...] = (Exception,)):
        self.primary_executer = primary_executer
        self.fallback_executer = fallback_executer
        self.error_types = error_types

    def run(self) -> Any:
        """
        Executes the main function and handles errors by switching to the fallback if necessary.
        
        Returns:
            The result of the successful execution or None if both attempts failed.
        """
        try:
            return self.primary_executer()
        except self.error_types as e:
            print(f"Primary executor failed with error: {e}")
            return self.fallback_executer() if callable(self.fallback_executer) else None
        finally:
            print("Execution completed.")


# Example Usage

def divide_and_square(numerator: int, denominator: int) -> float:
    """
    A function that divides two numbers and squares the result.
    Raises a ZeroDivisionError if division by zero is attempted.

    Parameters:
        numerator (int): The number to be divided.
        denominator (int): The number to divide by.

    Returns:
        float: The squared result of the division.
    """
    return (numerator / denominator) ** 2


def safe_divide_and_square(numerator: int, denominator: int) -> float:
    """
    A function that safely divides two numbers and squares the result with a fallback to zero in case of failure.

    Parameters:
        numerator (int): The number to be divided.
        denominator (int): The number to divide by.

    Returns:
        float: The squared result of the division or 0.0 if an error occurs.
    """
    return 0.0


# Example
executor = FallbackExecutor(
    primary_executer=divide_and_square,
    fallback_executer=safe_divide_and_square,
    error_types=(ZeroDivisionError,)
)

result = executor.run(numerator=16, denominator=4)
print(f"Result: {result}")
```

This example demonstrates how to use the `FallbackExecutor` class. It defines a primary function that may raise an error and a fallback function which is used if the primary one fails. The example usage shows dividing 16 by 4 using both functions, where division by zero would normally cause an exception but is handled gracefully with the fallback mechanism.