"""Create fallback_executor
Generated by Phi-Octopus Eden
2025-11-08 14:42:02.747728
"""

```python
from typing import Callable, Any


class FallbackExecutor:
    """
    A class that provides fallback execution mechanism for functions.

    This class allows you to define primary and secondary function executors.
    If the primary executor fails due to an error, the secondary executor is attempted.
    """

    def __init__(self, primary_executor: Callable[..., Any], 
                 secondary_executor: Callable[..., Any]):
        """
        Initialize FallbackExecutor with two function executors.

        :param primary_executor: The first function to attempt execution.
        :param secondary_executor: The second function to attempt if the primary fails.
        """
        self.primary_executor = primary_executor
        self.secondary_executor = secondary_executor

    def execute(self, *args, **kwargs) -> Any:
        """
        Attempt to execute the primary executor with provided arguments.
        If an error occurs, try executing the secondary executor.

        :param args: Arguments passed to the executors.
        :param kwargs: Keyword arguments passed to the executors.
        :return: The result of the successful execution or None if both fail.
        """
        try:
            return self.primary_executor(*args, **kwargs)
        except Exception as primary_error:
            print(f"Primary executor failed with error: {primary_error}")
            try:
                return self.secondary_executor(*args, **kwargs)
            except Exception as secondary_error:
                print(f"Secondary executor also failed with error: {secondary_error}")
                return None


# Example usage
def primary_add(a: int, b: int) -> int:
    """Add two integers."""
    return a + b

def secondary_add(a: int, b: int) -> int:
    """A more robust add function that catches and handles errors differently."""
    try:
        result = primary_add(a, b)
    except Exception as e:
        print(f"Caught exception in primary: {e}")
        result = 0
    return result

fallback_executor = FallbackExecutor(primary_add, secondary_add)

# Test the fallback mechanism
result = fallback_executor.execute(5, 10)  # Should be 15
print(f"Result of addition: {result}")

try:
    result = fallback_executor.execute('a', 'b')  # This should fail in primary_add and use secondary_add's logic
except TypeError as e:
    print(f"Error during execution: {e}")
```