IncomeTaxSystem/AppCode/Config.py

import mysql.connector
import os

# Database Config 
class DBConfig:
    MYSQL_HOST = os.getenv("DB_HOST")
    MYSQL_USER = os.getenv("DB_USER")
    MYSQL_PASSWORD = os.getenv("DB_PASSWORD")
    MYSQL_DB = os.getenv("DB_NAME")

    @staticmethod
    def get_db_connection():
        """
        Returns a MySQL connection object.
        """
        return mysql.connector.connect(
            host=DBConfig.MYSQL_HOST,
            user=DBConfig.MYSQL_USER,
            password=DBConfig.MYSQL_PASSWORD,
            database=DBConfig.MYSQL_DB
        )