"""Create fallback_executor
Generated by Phi-Octopus Eden
2025-11-06 00:54:34.522844
"""

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

class FallbackExecutor:
    """
    A class that provides a fallback mechanism for executing functions.
    
    When a primary function execution fails due to an error or any exception,
    it can be automatically replaced by one of the provided fallback functions.

    :param primary_func: The main function to attempt first
    :type primary_func: Callable[..., Any]
    :param fallback_funcs: A list of fallback functions that will be tried in sequence if the primary function fails.
    :type fallback_funcs: List[Callable[..., Any]]
    """

    def __init__(self, primary_func: Callable[..., Any], fallback_funcs: Optional[list] = None):
        self.primary_func = primary_func
        self.fallback_funcs = fallback_funcs or []

    def add_fallback(self, func: Callable[..., Any]) -> None:
        """
        Adds a function as a new fallback to be executed if the current one fails.

        :param func: The fallback function to add.
        :type func: Callable[..., Any]
        """
        self.fallback_funcs.append(func)

    def execute(self) -> Any:
        """
        Executes the primary function. If it raises an exception, tries each fallback in sequence until one succeeds.

        :return: The result of the executed function or None if all fail.
        :rtype: Any
        """
        try:
            return self.primary_func()
        except Exception as e:
            for func in self.fallback_funcs:
                try:
                    return func()
                except Exception:
                    pass
            return None

# Example usage
def main_func() -> str:
    """A function that may fail due to some condition."""
    raise ValueError("Main function failed")

def fallback_func1() -> str:
    """First fallback function, returns a default value if it fails."""
    return "Fallback 1"

def fallback_func2() -> str:
    """Second fallback function, exits with an error message if it fails."""
    print("Fallback 2 failed")
    exit()

# Creating the FallbackExecutor instance
executor = FallbackExecutor(main_func, [fallback_func1, fallback_func2])

# Executing the primary and fallback functions
result = executor.execute()
print(result)
```