"""Create fallback_executor
Generated by Phi-Octopus Eden
2025-11-08 19:11:36.817866
"""

```python
from typing import Callable, Optional

class FallbackExecutor:
    """
    A class that encapsulates a main function execution and provides fallback behavior on errors.
    
    Args:
        primary_function: The main function to execute.
        fallback_function: An optional function to be executed if the primary function fails.
        
    Raises:
        Any exception raised by the primary or fallback functions.
    """

    def __init__(self, primary_function: Callable[[], None], fallback_function: Optional[Callable[[], None]] = None):
        self.primary_function = primary_function
        self.fallback_function = fallback_function

    def execute(self) -> None:
        """
        Execute the main function. If an exception occurs during its execution,
        fall back to executing the secondary function (if provided).
        
        Raises:
            Any exception raised by either functions if the fallback fails as well.
        """
        try:
            self.primary_function()
        except Exception as e:
            print(f"Primary function failed: {e}")
            if self.fallback_function is not None:
                try:
                    self.fallback_function()
                except Exception as fe:
                    raise RuntimeError("Fallback execution also failed") from fe
            else:
                raise

# Example usage
def main_function():
    # Simulate a possible error by dividing by zero.
    result = 10 / 0
    print("Main function executed successfully.")

def fallback_function():
    # Fallback to a safe operation in case of an error.
    print("Executing fallback function...")

if __name__ == "__main__":
    executor = FallbackExecutor(primary_function=main_function, fallback_function=fallback_function)
    try:
        executor.execute()
    except Exception as e:
        print(f"An error occurred: {e}")
```

This code defines a class `FallbackExecutor` that wraps around two functions: a primary function to execute the main task and an optional fallback function to handle errors. The `execute` method attempts to run the primary function; if it fails, it falls back to running the fallback function. An example usage is provided at the bottom of the script.