"""Create fallback_executor
Generated by Phi-Octopus Eden
2025-11-08 09:09:43.256640
"""

```python
from typing import Callable, Optional


class FallbackExecutor:
    """
    A class for creating a fallback mechanism in functions to recover from errors.
    
    This allows you to define a main function and multiple fallbacks that will be tried
    if the main or any of the fallbacks raise an exception. The first non-exceptional result
    is returned.
    """

    def __init__(self, func: Callable):
        """
        Initialize the FallbackExecutor with the primary function to execute.

        :param func: The main function that will be executed and then fallback functions if necessary.
        """
        self.main_func = func

    def add_fallback(self, func: Callable) -> 'FallbackExecutor':
        """
        Add a fallback function that will be tried in case of an exception from the main or another fallback.

        :param func: The fallback function to add.
        :return: Self reference for method chaining
        """
        if not hasattr(self, 'fallbacks'):
            self.fallbacks = [self.main_func]
        self.fallbacks.append(func)
        return self

    def __call__(self, *args, **kwargs) -> Optional[str]:
        """
        Execute the main function or fallbacks in sequence.

        :param args: Positional arguments to pass to the functions.
        :param kwargs: Keyword arguments to pass to the functions.
        :return: The result of the first non-exceptional execution or None if all fail.
        """
        for func in self.fallbacks:
            try:
                return func(*args, **kwargs)
            except Exception as e:
                print(f"Error occurred while executing {func.__name__}: {e}")
        return None


# Example usage

def divide_and_square(x: float, y: float) -> float:
    """
    Divide x by y and then square the result.
    
    :param x: Numerator
    :param y: Denominator
    :return: Result of division squared
    """
    return (x / y) ** 2


def divide_and_square_fallback(x: float, y: float) -> float:
    """
    A fallback function that handles a zero denominator by returning None.
    
    :param x: Numerator
    :param y: Denominator
    :return: Result of division squared or None if y is 0
    """
    if y == 0:
        return None
    return (x / y) ** 2


# Creating the fallback executor with primary and fallback functions
fallback_executor = FallbackExecutor(divide_and_square).add_fallback(divide_and_square_fallback)

result = fallback_executor(10, 5)
print(f"Result: {result}")  # Normal execution

result = fallback_executor(10, 0)
print(f"Result with fallback: {result}")  # Fallback executed
```