"""Create fallback_executor
Generated by Phi-Octopus Eden
2025-11-07 06:05:41.686150
"""

```python
class FallbackExecutor:
    """
    A class that provides a fallback mechanism for executing operations.
    If an operation fails, it attempts to recover using a fallback method.

    Args:
        operation (Callable): The main operation function.
        fallback (Callable): The fallback function to use if the operation fails.
        max_attempts (int): Maximum number of attempts before giving up. Default is 3.
    
    Attributes:
        _operation (Callable): The main operation function.
        _fallback (Callable): The fallback function.
        _max_attempts (int): Maximum number of attempts allowed.

    Raises:
        OperationFailedException: If the maximum number of attempts is exceeded and recovery fails.
    """

    class OperationFailedException(Exception):
        """Raised when an operation or fallback execution fails after max_attempts."""
        pass

    def __init__(self, operation: Callable, fallback: Callable, max_attempts=3):
        self._operation = operation
        self._fallback = fallback
        self._max_attempts = max_attempts

    def execute(self, *args, **kwargs) -> Any:
        """
        Execute the main operation. If it fails, try executing the fallback.

        Args:
            *args: Positional arguments for the operation and fallback.
            **kwargs: Keyword arguments for the operation and fallback.

        Returns:
            The result of the successful execution (operation or fallback).

        Raises:
            OperationFailedException: If all attempts fail and recovery cannot be achieved.
        """
        attempt = 0
        while attempt < self._max_attempts:
            try:
                return self._operation(*args, **kwargs)
            except Exception as ex:
                if attempt == self._max_attempts - 1:
                    # Last attempt, no fallback available
                    raise OperationFailedException(f"Operation failed after {self._max_attempts} attempts: {str(ex)}")
                else:
                    try:
                        result = self._fallback(*args, **kwargs)
                        return result
                    except Exception as ex_fallback:
                        attempt += 1

# Example usage
def main_function(x):
    """Example operation that may fail."""
    import random
    if random.random() < 0.5:  # 50% chance of failing for demonstration purposes
        raise ValueError("Operation failed!")
    return x * 2

def fallback_function(x):
    """Fallback function when the main operation fails."""
    return x + 10

executor = FallbackExecutor(main_function, fallback_function)
result = executor.execute(10)  # Should succeed or fall back to the alternative
print(result)

try:
    result = executor.execute(20)  # Intentionally failing for demonstration of max_attempts limit
except OperationFailedException as e:
    print(e)
```