"""Create fallback_executor
Generated by Phi-Octopus Eden
2025-11-07 11:46:56.409531
"""

```python
from typing import Callable


class FallbackExecutor:
    """
    A class for creating a fallback mechanism in function execution.

    This class allows defining a primary function to be executed along with its parameters,
    and a secondary fallback function that can be used if the primary function fails.
    The fallback function will only execute if an error occurs during the execution of the
    primary function. Both functions are expected to return values, which can be later processed.

    :param primary_func: Callable function to run first; it should accept keyword arguments.
    :param fallback_func: Callable function to use as a backup in case the primary function fails; accepts same kwargs as `primary_func`.
    """

    def __init__(self, primary_func: Callable[..., object], fallback_func: Callable[..., object]):
        self.primary_func = primary_func
        self.fallback_func = fallback_func

    def execute(self, **kwargs) -> object:
        """
        Execute the primary function with given kwargs.
        If an error occurs during execution, attempt to run the fallback function.

        :param kwargs: Keyword arguments passed to both functions.
        :return: Result of the successful function or None if both fail.
        """
        try:
            return self.primary_func(**kwargs)
        except Exception as e:
            print(f"Error executing primary function: {e}")
            try:
                return self.fallback_func(**kwargs)
            except Exception as f_e:
                print(f"Fallback function also failed: {f_e}")
                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 one number from another."""
    return a - b


if __name__ == "__main__":
    executor = FallbackExecutor(add, subtract)

    # Successful execution
    result = executor.execute(a=5, b=3)
    print(f"Result (add): {result}")

    # Error during primary function execution
    result = executor.execute(a='5', b=3)  # Type error expected here
    print(f"Result with type error: {result}")
```