python mysql uitl

from traceback import format_exc

import pymysql as MySQLdb

class MySQLUtils(object):
    def get_db_conn(self, host, user, password, db, log_instance=None, charset='utf8', port=3306):
        """
        this function is able to get mysql connection
        :param host: mysql host
        :param user: mysql username
        :param password: mysql password
        :param db: mysql db name
        :param log_instance: log instance, default None
        :param charset: charset, default utf-8
        :param port: mysql port, default 3306
        :return: mysql connection
        """
        try:
            conn = MySQLdb.connect(host=host, user=user, passwd=password, db=db, charset=charset, port=port)

            return conn
        except:
            print(str(format_exc()))
            if log_instance != None:
                log_instance.error(str(format_exc()))

            return None