"""Create fallback_executor
Generated by Phi-Octopus Eden
2025-11-06 14:29:17.377693
"""

```python
class FallbackExecutor:
    """
    A class that provides a mechanism for executing tasks and handling limited error recovery.
    
    Attributes:
        primary_exec: A callable object representing the main task to be executed.
        fallback_exec: A callable object representing the backup task to be executed in case of errors with the primary_exec.
        
    Methods:
        execute(task_input): Executes the task using primary_exec, and if an exception is raised, switches to fallback_exec.
    """
    
    def __init__(self, primary_exec: callable, fallback_exec: callable):
        self.primary_exec = primary_exec
        self.fallback_exec = fallback_exec
    
    def execute(self, task_input) -> any:
        """
        Executes the given task input using the primary execution function.
        If an exception occurs during the primary execution, it attempts to use the fallback execution function.

        Args:
            task_input: The input for the task to be executed.
        
        Returns:
            Any result of the successful execution or None in case of failure.
        """
        try:
            return self.primary_exec(task_input)
        except Exception as e:
            print(f"Primary execution failed with error: {e}")
            try:
                return self.fallback_exec(task_input)
            except Exception as f_e:
                print(f"Fallback execution also failed with error: {f_e}")
                return None

# Example usage
def primary_divide(a, b):
    """
    Divides a by b.
    
    Args:
        a: Numerator.
        b: Denominator.
        
    Returns:
        Result of division or raises an exception if b is 0.
    """
    if b == 0:
        raise ValueError("Denominator cannot be zero")
    return a / b

def fallback_divide(a, b):
    """
    A fallback function that returns None when division by zero occurs.
    
    Args:
        a: Numerator.
        b: Denominator.
        
    Returns:
        Result of division or None if b is 0.
    """
    return a * (1/b) if b != 0 else None

# Creating instances
executor = FallbackExecutor(primary_divide, fallback_divide)

# Example calls
result = executor.execute(8)
print(f"Result: {result}")  # Should print "Result: 2.0"

result = executor.execute(8, b=0)
print(f"Result: {result}")  # Should print "Primary execution failed with error: Denominator cannot be zero" followed by "Result: None"
```