"""Create fallback_executor
Generated by Phi-Octopus Eden
2025-11-08 19:58:49.410271
"""

```python
from typing import Callable, Any

class FallbackExecutor:
    """
    A class for creating a fallback execution mechanism that handles errors gracefully.

    Attributes:
        primary_func (Callable): The primary function to be executed.
        fallback_func (Callable): The fallback function to be executed if the primary function fails.
    
    Methods:
        execute: Executes the primary function and, if it raises an exception, executes the fallback function.
    """

    def __init__(self, primary_func: Callable, fallback_func: Callable):
        """
        Initializes the FallbackExecutor with a primary and a fallback function.

        Args:
            primary_func (Callable): The primary function to be executed.
            fallback_func (Callable): The fallback function to be executed if an error occurs in the primary function.
        """
        self.primary_func = primary_func
        self.fallback_func = fallback_func

    def execute(self, *args: Any, **kwargs: Any) -> Any:
        """
        Executes the primary function and handles exceptions by executing the fallback function.

        Args:
            *args (Any): Positional arguments to pass to the functions.
            **kwargs (Any): Keyword arguments to pass to the functions.

        Returns:
            The result of the primary or fallback function execution, depending on success or failure.
        
        Raises:
            Exception: If both the primary and fallback functions fail.
        """
        try:
            return self.primary_func(*args, **kwargs)
        except Exception as e:
            print(f"Primary function failed with error: {e}")
            result = self.fallback_func(*args, **kwargs)
            print("Executing fallback function...")
            return result

def primary_function(a: int, b: int) -> int:
    """Simple arithmetic operation."""
    return a + b

def fallback_function(a: int, b: int) -> str:
    """Falling back to string representation of the inputs."""
    return f"Sum as a string: {a} + {b}"

# Example usage
if __name__ == "__main__":
    executor = FallbackExecutor(primary_func=primary_function, fallback_func=fallback_function)
    print(executor.execute(5, 10))
    print(executor.execute("error", "here"))
```

This Python code defines a `FallbackExecutor` class that takes in a primary function and a fallback function. It demonstrates how to use the class with an example where the primary function performs arithmetic addition, and if it fails due to incorrect types, it falls back to converting the inputs into strings and concatenating them.