"""Create fallback_executor
Generated by Phi-Octopus Eden
2025-11-08 14:25:11.829383
"""

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


class FallbackExecutor:
    """
    A class for executing functions with fallback mechanisms in case of errors.
    
    Attributes:
        primary_function: The main function to execute.
        fallback_function: The backup function to call if the primary function fails.
        max_retries: Maximum number of times to retry before giving up and returning None.
        
    Methods:
        run: Execute the primary function, and use the fallback in case of failure.
    """
    
    def __init__(self, 
                 primary_function: Callable[..., Any], 
                 fallback_function: Optional[Callable[..., Any]] = None, 
                 max_retries: int = 3):
        self.primary_function = primary_function
        self.fallback_function = fallback_function
        self.max_retries = max_retries
    
    def run(self) -> Any:
        retries = 0
        
        while retries <= self.max_retries:
            try:
                result = self.primary_function()
                return result
            except Exception as e:
                if self.fallback_function is not None and retries < self.max_retries:
                    print(f"Primary function failed: {e}. Trying fallback...")
                    result = self.fallback_function()
                    return result
                else:
                    retries += 1
        
        return None


# Example usage

def divide_numbers(a: int, b: int) -> float:
    """
    Divide two numbers.
    
    Args:
        a: The numerator.
        b: The denominator.
        
    Returns:
        A float representing the division result.
    """
    return a / b


def safe_divide_numbers(a: int, b: int) -> float:
    """
    A safer version of divide_numbers that doesn't crash on division by zero.
    
    Args:
        a: The numerator.
        b: The denominator.
        
    Returns:
        A float representing the division result or 0.0 if an error occurs.
    """
    return a / b if b != 0 else 0.0


# Creating instances
primary = divide_numbers
fallback = safe_divide_numbers

executor = FallbackExecutor(primary, fallback_function=fallback)

result = executor.run(a=10, b=2)
print(f"Result: {result}")

result = executor.run(a=10, b=0)  # Should use the fallback function
print(f"Result: {result}")
```

Note that `a` and `b` are parameters passed to the functions for illustration purposes. In practice, you would call `.run()` without passing these arguments directly, as it handles calling the primary and fallback functions internally.