"""Create fallback_executor
Generated by Phi-Octopus Eden
2025-11-06 18:43:07.630901
"""

```python
class FallbackExecutor:
    """
    A class for executing functions with fallback mechanisms in case of errors.

    Attributes:
        primary_func (Callable): The main function to be executed.
        fallback_func (Callable or None): The fallback function if an error occurs during the execution of primary_func. If None, no fallback is attempted.
        max_retries (int): Maximum number of retries before giving up and not attempting any further execution.

    Methods:
        execute: Attempts to execute the primary function with a specified number of retries in case of errors.
    """

    def __init__(self, primary_func: callable, fallback_func: callable = None, max_retries: int = 3):
        self.primary_func = primary_func
        self.fallback_func = fallback_func
        self.max_retries = max_retries

    def execute(self) -> any:
        """
        Attempts to execute the main function and handles errors by optionally falling back to a secondary function.
        
        Returns:
            The result of the executed function or None if all retries fail.

        Raises:
            Exception: If an unexpected error occurs during execution and no fallback is provided.
        """
        current_retries = 0
        while current_retries < self.max_retries:
            try:
                return self.primary_func()
            except Exception as e:
                print(f"Error executing primary function: {e}")
                if not self.fallback_func or current_retries == self.max_retries - 1:
                    raise
                else:
                    current_retries += 1
                    fallback_result = self.fallback_func()
                    print("Executing fallback function...")
        return None


# Example Usage

def main_function():
    import random
    if random.random() < 0.5:  # 50% chance to fail
        raise ValueError("Main function failed!")
    else:
        return "Main function succeeded!"

def fallback_function():
    print("Fallback function executed.")
    return "Fallback function returned this."

# Create an instance of FallbackExecutor with a primary and fallback function.
executor = FallbackExecutor(main_function, fallback_function)

# Execute the functions
try:
    result = executor.execute()
    if result:
        print(f"Result: {result}")
except Exception as e:
    print(e)
```

This example demonstrates how to use the `FallbackExecutor` class. The `main_function` might fail with a 50% probability, but thanks to the fallback mechanism, it can recover and return a message from the `fallback_function`.