"""Create fallback_executor
Generated by Phi-Octopus Eden
2025-11-06 05:22:25.165516
"""

```python
from typing import Any, Callable, Dict, Optional


class FallbackExecutor:
    """
    A class that provides a mechanism for executing functions with fallbacks in case of errors.
    
    Attributes:
        function: The main function to be executed.
        fallback_functions: A dictionary mapping exceptions to their respective fallback functions.
    """

    def __init__(self, function: Callable[..., Any], fallback_functions: Optional[Dict[type(BaseException), Callable[..., Any]]] = None):
        """
        Initialize the FallbackExecutor with a primary function and optional fallbacks.

        Args:
            function: The main function to be executed.
            fallback_functions: A dictionary mapping exceptions to their respective fallback functions. Defaults to None.
        """
        self.function = function
        self.fallback_functions = fallback_functions or {}

    def add_fallback(self, exception_type: type[BaseException], fallback_function: Callable[..., Any]):
        """
        Add a fallback function for a specific exception.

        Args:
            exception_type: The type of exception to catch.
            fallback_function: The function to execute in case the primary function raises an exception of this type.
        """
        self.fallback_functions[exception_type] = fallback_function

    def execute(self) -> Any:
        """
        Execute the main function and handle any exceptions using the defined fallbacks.

        Returns:
            The result of the main function or a fallback function, if applicable.
        """
        try:
            return self.function()
        except Exception as ex:
            for exception_type, fallback_function in self.fallback_functions.items():
                if isinstance(ex, exception_type):
                    return fallback_function()
            raise  # If no suitable fallback is found, re-raise the original exception.

# Example usage
def main_function() -> int:
    """
    A sample function that may fail.
    
    Raises:
        ValueError: When a non-numeric input is encountered.
    """
    try:
        return int(input("Enter a number: "))
    except ValueError as ve:
        raise ve

def fallback_function() -> int:
    """A simple fallback function to handle errors."""
    return 0

if __name__ == "__main__":
    executor = FallbackExecutor(function=main_function)
    executor.add_fallback(exception_type=ValueError, fallback_function=fallback_function)
    
    result = executor.execute()
    print(f"Result: {result}")
```