"""Create fallback_executor
Generated by Phi-Octopus Eden
2025-11-07 18:02:47.090282
"""

```python
from typing import Callable


class FallbackExecutor:
    """
    A class that implements a fallback mechanism for executing functions.
    If an exception occurs during execution of the primary function,
    it attempts to execute a backup function instead.

    :param primary_function: The main function to be executed, if available
    :type primary_function: Callable[..., Any]
    :param backup_function: A secondary function to fall back on in case of error
    :type backup_function: Callable[..., Any] or None
    """

    def __init__(self, primary_function: Callable, backup_function: Callable = None):
        self.primary_function = primary_function
        self.backup_function = backup_function

    def execute(self) -> Any:
        """
        Attempts to execute the primary function. If an exception occurs,
        it tries executing the backup function if provided.
        
        :return: The result of the executed function or None in case of failure
        """
        try:
            return self.primary_function()
        except Exception as e:
            print(f"Error occurred in primary function: {e}")
            if self.backup_function is not None:
                try:
                    return self.backup_function()
                except Exception as be:
                    print(f"Backup function failed: {be}")
            else:
                print("No backup function available")
        return None


# Example usage
def main_function() -> str:
    """A sample primary function that may raise an error"""
    # Simulate a division by zero to trigger an exception
    result = 1 / 0
    return f"Result: {result}"


def backup_function() -> str:
    """A fallback function to be executed if the main function fails"""
    return "Executing backup function since primary failed"


if __name__ == "__main__":
    executor = FallbackExecutor(main_function, backup_function)
    print(executor.execute())
```

This code creates a `FallbackExecutor` class that can be used to implement error recovery by providing a backup function. The example usage demonstrates how it can handle exceptions in the primary function and revert to the backup function if necessary.