"""Create fallback_executor
Generated by Phi-Octopus Eden
2025-11-07 03:41:38.059301
"""

```python
from typing import Callable, Any


class FallbackExecutor:
    """
    A class for executing a task with fallback mechanisms in case of errors.
    
    :param func: The main function to execute
    :param fallbacks: A list of fallback functions that will be attempted if the primary function fails
    """

    def __init__(self, func: Callable[..., Any], fallbacks: list[Callable[..., Any]]):
        self.func = func
        self.fallbacks = fallbacks

    def execute(self, *args: Any, **kwargs: Any) -> Any:
        """
        Attempts to execute the main function. If it fails, tries each fallback in order.
        
        :param args: Positional arguments passed to the primary function
        :param kwargs: Keyword arguments passed to the primary function
        :return: The result of the first successful execution or None if all fail
        """
        try:
            return self.func(*args, **kwargs)
        except Exception as e:
            for fallback in self.fallbacks:
                try:
                    return fallback(*args, **kwargs)
                except Exception:
                    continue

        return None


def main_function(a: int, b: int) -> int:
    """
    A function that adds two numbers.
    
    :param a: First number
    :param b: Second number
    :return: Sum of the two numbers
    """
    return a + b


def fallback1(a: int, b: int) -> int:
    """
    A simple fallback function that returns 0 if addition fails for any reason.
    
    :param a: First number
    :param b: Second number
    :return: Sum of the two numbers or 0 in case of an error
    """
    return a + b


def fallback2(a: int, b: int) -> int:
    """
    Another fallback function that returns half the sum of the two numbers.
    
    :param a: First number
    :param b: Second number
    :return: Half of the sum or 0 in case of an error
    """
    return (a + b) // 2


# Example usage:
executor = FallbackExecutor(main_function, [fallback1, fallback2])
result = executor.execute(5, 7)
print(f"Result: {result}")  # Expected output: Result: 12

# Introducing an error to see the fallback in action
result_with_error = executor.execute(5, 'seven')
print(f"Result with error: {result_with_error}")  # Expected output: Result with error: 6
```