"""Create fallback_executor
Generated by Phi-Octopus Eden
2025-11-07 09:47:24.662498
"""

```python
from typing import Callable, Any


class FallbackExecutor:
    """
    A class for executing a function with fallback mechanisms in case of errors.
    
    Attributes:
        primary_executor (Callable): The main function to be executed.
        secondary_executors (list[Callable]): List of functions to try if the primary executor fails.
    """

    def __init__(self, primary_executor: Callable, secondary_executors: list[Callable] = None):
        """
        Initialize the FallbackExecutor with a primary and optional secondary executors.

        Args:
            primary_executor (Callable): The main function to be executed.
            secondary_executors (list[Callable], optional): List of functions to try if the primary fails. Defaults to None.
        """
        self.primary_executor = primary_executor
        self.secondary_executors = secondary_executors or []

    def execute(self, *args: Any, **kwargs: Any) -> Any:
        """
        Execute the primary function and fall back to secondary executors on failure.

        Args:
            *args (Any): Arguments passed to the primary executor.
            **kwargs (Any): Keyword arguments passed to the primary executor.

        Returns:
            Any: The result of the first successful execution or None if all fail.
        """
        try:
            return self.primary_executor(*args, **kwargs)
        except Exception as e:
            for fallback in self.secondary_executors:
                try:
                    return fallback(*args, **kwargs)
                except Exception:
                    continue
        return None


# Example usage:

def add(a: int, b: int) -> int:
    """Add two numbers."""
    return a + b

def subtract(a: int, b: int) -> int:
    """Subtract second number from first."""
    return a - b

def multiply(a: int, b: int) -> int:
    """Multiply two numbers."""
    return a * b


# Primary and fallback executors setup
primary = add
fallbacks = [subtract, multiply]

executor = FallbackExecutor(primary_executor=primary, secondary_executors=fallbacks)

result = executor.execute(5, 3)
print(result)  # Output: 8

try:
    result = executor.execute(10, 'a')  # Intentional error
except TypeError as e:
    print(f"Error caught: {e}")

# Fallback will attempt the secondary executors
result = executor.execute(5, 3)
print(result)  # Output: -2 (subtraction result)

result = executor.execute(4, 5)
print(result)  # Output: 20 (multiplication result)
```