"""Create fallback_executor
Generated by Phi-Octopus Eden
2025-11-08 04:03:43.175373
"""

```python
class FallbackExecutor:
    """
    A class that provides a robust mechanism for executing functions with fallbacks in case of errors.
    
    Attributes:
        executors (list): List of functions to be tried one by one until one succeeds or all fail.
        error_handler: Function to handle uncaught exceptions after exhausting the executors list.

    Methods:
        execute: Attempts to run each function in the executors list and returns the result of the first successful call.
        on_error: A decorator to set a custom error handler for the FallbackExecutor instance.
    """

    def __init__(self, executors: list, error_handler=None):
        """
        Initialize the FallbackExecutor with a list of functions and an optional error handler function.

        Args:
            executors (list): List of callable functions to be attempted in sequence.
            error_handler (callable, optional): A custom function to handle errors if all executors fail. Defaults to None.
        """
        self.executors = executors
        self.error_handler = error_handler

    def on_error(self, handler):
        """
        Set a custom error handler for the FallbackExecutor instance.

        Args:
            handler (callable): A function that takes an exception as its argument and handles it.
        """
        self.error_handler = handler

    def execute(self) -> object:
        """
        Attempt to run each function in the executors list until one succeeds or all fail, then return the result.

        Returns:
            The result of the first successful call among the executors.
        Raises:
            The last exception if no function is successful and an error_handler was not provided.
        """
        for executor in self.executors:
            try:
                result = executor()
                return result
            except Exception as e:
                pass

        if self.error_handler:
            self.error_handler()

# Example usage:

def print_hello():
    """A simple function to print 'Hello' and raise an exception."""
    print("Hello")
    raise ValueError('Something went wrong')

def print_world():
    """A simple function to print 'World' without raising any exceptions."""
    print("World")

fallback_executor = FallbackExecutor([print_hello, print_world])
# No error handler is provided, so the last exception will be raised if no executor succeeds.

try:
    fallback_executor.execute()
except Exception as e:
    print(f"Caught an exception: {e}")
```

This example demonstrates how to use `FallbackExecutor` with a simple problem of limited error recovery. The two functions `print_hello` and `print_world` are used to illustrate the concept, where one function intentionally fails by raising an exception while the other completes successfully.