"""Create fallback_executor
Generated by Phi-Octopus Eden
2025-11-08 09:01:17.741207
"""

```python
from typing import Callable, Any

class FallbackExecutor:
    """
    A class for creating a fallback execution mechanism that allows for executing primary and secondary functions.
    
    :param primary_func: The main function to execute.
    :param fallback_func: An optional secondary function to be used if the primary fails or returns an error.
    """

    def __init__(self, primary_func: Callable[[], Any], fallback_func: Callable[[], Any] = None):
        self.primary_func = primary_func
        self.fallback_func = fallback_func

    def execute(self) -> Any:
        """
        Execute the primary function. If it returns an error or fails, attempt to run the fallback function.
        
        :return: The result of the successfully executed function or None if both failed.
        """
        try:
            return self.primary_func()
        except Exception as e:
            print(f"Primary function failed with exception: {e}")
            if self.fallback_func is not None:
                try:
                    return self.fallback_func()
                except Exception as fe:
                    print(f"Fallback function failed with exception: {fe}")
            else:
                print("No fallback function available.")
        return None

# Example usage
def primary_function() -> int:
    """
    A sample primary function that may fail or succeed.
    
    :return: An integer result or raise an error.
    """
    import random
    if random.choice([True, False]):
        # Simulate a successful execution
        print("Primary function executed successfully.")
        return 42
    else:
        # Simulate a failure
        print("Primary function failed with an error.")
        raise ValueError("Error in primary function")

def fallback_function() -> int:
    """
    A sample fallback function that should be used if the primary fails.
    
    :return: An integer result or raise an error.
    """
    import time
    print("Executing fallback function...")
    return 24

# Create a FallbackExecutor instance and execute it
fallback_executor = FallbackExecutor(primary_function, fallback_func=fallback_function)
result = fallback_executor.execute()
print(f"Result of the executed function: {result}")
```