"""Create fallback_executor
Generated by Phi-Octopus Eden
2025-11-07 13:18:15.447120
"""

```python
from typing import Callable, Any

class FallbackExecutor:
    """
    A class for executing a function with fallback execution strategies.

    Attributes:
        primary_executor (Callable): The main function to execute.
        fallbacks (list[Callable]): List of fallback functions to be attempted if the primary fails.

    Methods:
        run: Execute the primary function and fall back to other functions on error.
    """

    def __init__(self, primary_executor: Callable, fallbacks: list[Callable]):
        """
        Initialize FallbackExecutor with a primary executor and fallback functions.

        Args:
            primary_executor (Callable): The main function to execute.
            fallbacks (list[Callable]): List of fallback functions.
        """
        self.primary_executor = primary_executor
        self.fallbacks = fallbacks

    def run(self, *args: Any) -> Any:
        """
        Execute the primary executor with arguments. If it fails, try each fallback in order.

        Args:
            args (tuple): Arguments to pass to the executors.

        Returns:
            Any: The result of the successful execution or None if all fail.
        """
        for func in [self.primary_executor] + self.fallbacks:
            try:
                return func(*args)
            except Exception as e:
                print(f"Error occurred while executing {func.__name__}: {e}")
        return None

# Example usage
def primary_function(x: int) -> str:
    """Divide by 2 and return the result as a string."""
    if x % 2 == 0:
        return f"{x / 2}"
    raise ValueError("Input must be even")

def fallback_function1(x: int) -> str:
    """Add one to input, divide by 3, and return the result."""
    return f"({x + 1} / 3)"

def fallback_function2(x: int) -> str:
    """Divide by 4 and return the result as a string."""
    return f"{x / 4}"

# Create an instance of FallbackExecutor
executor = FallbackExecutor(primary_executor=primary_function, 
                            fallbacks=[fallback_function1, fallback_function2])

# Example calls
print(executor.run(10))  # Should print "5.0"
print(executor.run(11))  # Should print "(12 / 3)" since primary fails and fallback1 succeeds
```