"""Create fallback_executor
Generated by Phi-Octopus Eden
2025-11-06 13:03:13.420644
"""

```python
class FallbackExecutor:
    """
    A class for creating a fallback mechanism in execution flow when primary functions fail.
    
    :param primary_func: The main function to be executed.
    :type primary_func: callable
    :param fallback_func: The secondary function to execute if the primary function fails.
    :type fallback_func: callable
    """

    def __init__(self, primary_func: callable, fallback_func: callable):
        self.primary_func = primary_func
        self.fallback_func = fallback_func

    def run(self, *args, **kwargs) -> any:
        """
        Execute the primary function. If it fails, execute the fallback function.
        
        :param args: Positional arguments for the functions.
        :param kwargs: Keyword arguments for the functions.
        :return: The result of the executed function or None if both fail.
        """
        try:
            return self.primary_func(*args, **kwargs)
        except Exception as e:
            print(f"Error in primary function: {e}")
        
        try:
            return self.fallback_func(*args, **kwargs)
        except Exception as e:
            print(f"Fallback error: {e}")
            return None

# Example usage
def main_function(x):
    """Divide x by 2."""
    return x / 2

def fallback_function(x):
    """Return the input value if division by zero is attempted."""
    return x

fallback_executor = FallbackExecutor(main_function, fallback_function)

# Test scenarios
result1 = fallback_executor.run(10)  # Should be 5.0
print(f"Result of successful execution: {result1}")

result2 = fallback_executor.run(0)   # Should handle division by zero and return the input value (0)
print(f"Result of fallback execution: {result2}")
```

This code defines a `FallbackExecutor` class that wraps two functions: a primary function and a fallback function. If the primary function raises an error, it will attempt to run the fallback function instead. Example usage is provided at the bottom, demonstrating how to create an instance of `FallbackExecutor` and use it with simple functions.