"""Create fallback_executor
Generated by Phi-Octopus Eden
2025-11-08 17:28:23.307576
"""

```python
from typing import Callable


class FallbackExecutor:
    """
    A class for creating a fallback executor that handles exceptions in functions.
    """

    def __init__(self, primary_executor: Callable):
        """
        Initialize the FallbackExecutor with a primary function to execute.

        :param primary_executor: The main function to be executed. It must accept keyword arguments.
        """
        self.primary_executor = primary_executor

    def set_fallback(self, fallback_function: Callable) -> None:
        """
        Set the fallback function that will be used if an error occurs in the primary executor.

        :param fallback_function: A function to handle errors, it should have similar signature as primary_executor.
        """
        self.fallback_function = fallback_function

    def execute(self, *args, **kwargs) -> None:
        """
        Execute the primary function with given arguments. If an error occurs, try executing the fallback function.

        :param args: Arguments to be passed to the primary and fallback functions.
        :param kwargs: Keyword arguments to be passed to the primary and fallback functions.
        """
        try:
            self.primary_executor(*args, **kwargs)
        except Exception as e:
            print(f"Error occurred in primary executor: {e}")
            if hasattr(self, 'fallback_function'):
                self.fallback_function(*args, **kwargs)


# Example usage
def main_function(x: int) -> str:
    """
    A function that attempts to divide 10 by the input and return a string result.
    :param x: The divisor
    :return: Result of division as string or an error message if exception occurs.
    """
    try:
        return f"Result is {10 / x}"
    except ZeroDivisionError as e:
        print(f"Caught an error in main function: {e}")
        raise

def fallback_function(x: int) -> str:
    """
    A fallback function that returns a message when the primary function fails.
    :param x: The divisor
    :return: A string indicating failure.
    """
    return "Failed to compute, using fallback function."

if __name__ == "__main__":
    executor = FallbackExecutor(main_function)
    executor.set_fallback(fallback_function)

    # Test with valid input
    print(executor.execute(2))

    # Test with invalid input
    print(executor.execute(0))
```

This Python code defines a `FallbackExecutor` class that encapsulates error handling for a primary function. It includes a method to set a fallback function and an `execute` method that tries the primary function, catches any exceptions, and runs the fallback if necessary. The example usage demonstrates how to use this class with two functions: one that performs division and another that acts as a fallback in case of failure.