"""Create error_monitor
Generated by Phi-Octopus Eden
2025-11-07 01:59:46.445768
"""

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


class ErrorMonitor:
    """
    A class for monitoring errors in a system and handling them gracefully.
    """

    def __init__(self):
        self.error_handlers: dict[str, Callable[[Exception], None]] = {}
        self.logger = logging.getLogger(__name__)
        self.setup_logger()

    def setup_logger(self) -> None:
        """Configure the logger to write errors to a file named 'error.log'"""
        handler = logging.FileHandler('error.log')
        formatter = logging.Formatter('%(asctime)s - %(levelname)s - %(message)s')
        handler.setFormatter(formatter)
        self.logger.addHandler(handler)
        self.logger.setLevel(logging.ERROR)

    def add_error_handler(self, error_type: str, handler: Callable[[Exception], None]) -> None:
        """
        Add a custom error handler for the specified error type.

        :param error_type: Type of exception to handle
        :param handler: Function that will be called when the exception occurs
        """
        self.error_handlers[error_type] = handler

    def monitor(self, func: Callable[..., Any]) -> Callable[..., Any]:
        """
        Decorator for functions to add error monitoring.

        :param func: The function to decorate and wrap in error handling.
        :return: A wrapped function with error handling
        """

        def wrapper(*args, **kwargs) -> Any:
            try:
                return func(*args, **kwargs)
            except Exception as e:
                self.logger.error(f"An error occurred in {func.__name__}: {str(e)}", exc_info=True)

                # Check if a custom handler is set for the type of exception
                error_type = str(type(e).__name__)
                if error_type in self.error_handlers:
                    self.error_handlers[error_type](e)
                else:
                    self.logger.warning(f"No specific handler found for {error_type}.")

        return wrapper

    def handle_exception(self, error_type: str, handler: Callable[[Exception], None]) -> None:
        """
        A method to add a new exception type and its corresponding handler.

        :param error_type: The name of the error type
        :param handler: The function to handle this error type
        """
        self.add_error_handler(error_type, handler)

    def __call__(self, func: Callable[..., Any]) -> Callable[..., Any]:
        return self.monitor(func)


# Example usage

def divide(x: int, y: int) -> float:
    """Divide two numbers."""
    if y == 0:
        raise ValueError("Division by zero is not allowed.")
    return x / y


@ErrorMonitor()
def example_function() -> None:
    """
    A function that may cause a division error.
    """
    try:
        result = divide(10, 0)
        print(f"Result: {result}")
    except Exception as e:
        # This handler is not registered and will be handled by the logger
        raise


def handle_division_error(e: ValueError) -> None:
    """Handler for division errors."""
    logging.warning("Division error occurred. Handling it gracefully.")


if __name__ == "__main__":
    # Registering a custom handler
    error_monitor = ErrorMonitor()
    error_monitor.add_error_handler('ValueError', handle_division_error)

    try:
        example_function()  # This will log the division by zero and call our custom handler
    except Exception as e:
        logging.error(f"An unexpected error occurred: {str(e)}")
```

This code defines a class `ErrorMonitor` that can be used to monitor errors in functions. It includes methods for adding custom error handlers, monitoring functions, and handling exceptions. The example usage at the bottom demonstrates how to use the class with a function that might raise an exception.