"""Create fallback_executor
Generated by Phi-Octopus Eden
2025-11-08 04:52:36.046816
"""

```python
from typing import Callable, Any


class FallbackExecutor:
    """
    A class for executing a function with fallback mechanisms.

    This class provides a way to attempt running a main execution block,
    and if it fails, switch to an alternative backup method.
    
    Attributes:
        main_func (Callable): The primary function to be executed.
        fallback_func (Callable): The secondary function to be used in case of failure.
        error_handler (Callable, optional): A handler for custom error management.

    Methods:
        run: Executes the main function and handles errors by switching to the fallback if necessary.
    """

    def __init__(self, main_func: Callable[..., Any], fallback_func: Callable[..., Any], 
                 error_handler: Callable[[Exception], None] = lambda e: print(f"Error occurred: {e}")):
        self.main_func = main_func
        self.fallback_func = fallback_func
        self.error_handler = error_handler

    def run(self) -> Any:
        """
        Attempts to execute the main function. If an exception occurs, it will catch and handle it by running
        the fallback function instead.
        
        Returns:
            The result of the executed function or None in case of failure.
        """
        try:
            return self.main_func()
        except Exception as e:
            print("Execution failed, switching to fallback method.")
            self.error_handler(e)
            return self.fallback_func()


# Example usage
def main_function() -> int:
    x = 1 / 0  # Simulating an intentional error
    return len(str(x))


def backup_function() -> str:
    return "Fallback successful!"


if __name__ == "__main__":
    fallback_executor = FallbackExecutor(main_function, backup_function)
    result = fallback_executor.run()
    print(f"Result: {result}")
```

This example demonstrates how the `FallbackExecutor` class can be used to manage errors and switch between primary and fallback functions. The `main_function` intentionally raises an error, which is caught by the `FallbackExecutor`, and instead of crashing, it runs the `backup_function`.