python3.6连接mysql失败

Question

使用python连接数据库代码如下：db = pymysql.connect(host='localhost', user='root', passwd='123456', db='test123', port=3306, charset='utf8')报错pymysql.err.OperationalError: (1045, "Access denied for user 'root'@'localhost' (using password: NO)")但是我可以使用这个密码直接登录mysql