"""Create fallback_executor
Generated by Phi-Octopus Eden
2025-11-06 13:02:06.352228
"""

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


class FallbackExecutor:
    """
    A class for handling function execution with fallbacks in case of errors.
    
    Attributes:
        default_func (Callable): The default function to execute when a fallback is not set.
        fallback_funcs (Dict[Exception, Callable]): A dictionary mapping exceptions to their respective fallback functions.
        
    Methods:
        run: Executes the default function or a fallback based on an exception caught during execution.
    """
    
    def __init__(self, default_func: Callable) -> None:
        self.default_func = default_func
        self.fallback_funcs: Dict[Exception, Callable] = {}
    
    def register_fallback(self, exception_type: Exception, fallback_func: Callable) -> None:
        """Register a fallback function for a specific exception type."""
        self.fallback_funcs[exception_type] = fallback_func
    
    def run(self, *args: Any, **kwargs: Any) -> Any:
        """
        Execute the default function or a registered fallback.
        
        Args:
            *args: Positional arguments to pass to the functions.
            **kwargs: Keyword arguments to pass to the functions.
            
        Returns:
            The result of the executed function or fallback if an exception occurs.
        """
        try:
            return self.default_func(*args, **kwargs)
        except Exception as e:
            for exc_type, fallback in self.fallback_funcs.items():
                if isinstance(e, exc_type):
                    return fallback(*args, **kwargs)
            raise  # Re-raise the exception if no fallback is registered


# Example usage
def divide(a: int, b: int) -> float:
    """Divide two numbers."""
    return a / b

def safe_divide(a: int, b: int) -> Optional[float]:
    """Safe division with fallback for zero division error."""
    try:
        return divide(a, b)
    except ZeroDivisionError:
        print("Error: Division by zero.")
        return None


# Creating an instance of FallbackExecutor
executor = FallbackExecutor(default_func=divide)

# Registering a fallback function for ZeroDivisionError
executor.register_fallback(ZeroDivisionError, safe_divide)

# Example calls with and without error
print(executor.run(10, 2))          # Should print 5.0
print(executor.run(10, 0))          # Should handle the exception and not crash
```