src/exception/__init__.py

import sys
import logging

def error_message_detail(error: Exception, error_detail: sys) -> str:
   
    _, _, exc_tb = error_detail.exc_info()

    if exc_tb is not None:
        # Get the file name where the exception occurred
        file_name = exc_tb.tb_frame.f_code.co_filename
        line_number = exc_tb.tb_lineno
    else:
        # Fallback to current frame info if no traceback (e.g. manual raise)
        import inspect
        frame = inspect.currentframe().f_back.f_back # Go back to where MyException was called
        file_name = frame.f_code.co_filename
        line_number = frame.f_lineno

    # Create a formatted error message string with file name, line number, and the actual error
    error_message = f"Error occurred in python script: [{file_name}] at line number [{line_number}]: {str(error)}"
    
    # Log the error for better tracking
    logging.error(error_message)
    
    return error_message


class MyException(Exception):
    def __init__(self, error_message: str, error_detail: sys):
        # Call the base class constructor with the error message
        super().__init__(error_message)

        # Format the detailed error message using the error_message_detail function
        self.error_message = error_message_detail(error_message, error_detail)

    def __str__(self) -> str:
        """
        Returns the string representation of the error message.
        """
        return self.error_message