"""Create fallback_executor
Generated by Phi-Octopus Eden
2025-11-07 22:48:34.560088
"""

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

class FallbackExecutor:
    """
    A class to handle execution of tasks with fallback mechanisms for handling errors.
    
    Attributes:
        primary_executor (Callable): The primary function that is attempted first.
        fallback_executors (Dict[str, Callable]): Dictionary of fallback functions indexed by error type.
    
    Methods:
        execute: Attempts to run the primary executor. If it fails, tries a fallback based on the exception.
    """
    
    def __init__(self, primary_executor: Callable[..., Any], fallback_executors: Dict[str, Callable[..., Any]]):
        self.primary_executor = primary_executor
        self.fallback_executors = fallback_executors
    
    def execute(self, *args, **kwargs) -> Any:
        try:
            return self.primary_executor(*args, **kwargs)
        except Exception as e:
            error_type = type(e).__name__
            if error_type in self.fallback_executors:
                print(f"Primary executor failed with {error_type}, trying fallback.")
                return self.fallback_executors[error_type](*args, **kwargs)
            else:
                raise e
    
def example_function(x: int) -> int:
    """
    A simple function that may fail if x is negative.
    
    Args:
        x (int): An input integer.
    
    Returns:
        int: The square of the input integer.
    """
    return x ** 2

# Define a fallback function
def positive_square(x: int) -> int:
    """
    A fallback function that squares only if the number is positive.
    
    Args:
        x (int): An input integer.
    
    Returns:
        int: The square of the input integer if it's positive, otherwise returns 0.
    """
    return max(0, x ** 2)

if __name__ == "__main__":
    # Example usage
    primary = example_function
    fallbacks = {"ValueError": positive_square}
    
    executor = FallbackExecutor(primary, fallbacks)
    
    print(executor.execute(-4))  # Will use the fallback function
    print(executor.execute(3))   # Will use the primary function

```