import pymysql
import config

from pymysql.constants import CLIENT


def database_connection():
    """Returns database connection."""
    db_connection = pymysql.connect(
        host=config.DATABASE_HOSTNAME,
        user=config.DATABASE_USER_NAME,
        password=config.DATABASE_PASSWORD,
        db=config.DATABASE,
        client_flag=CLIENT.MULTI_STATEMENTS
    )
    return db_connection