关于python:pymysql操作数据库

import pymysql.cursors# Connect to the databaseconnection = pymysql.connect(host='localhost',                             user='user',                             password='passwd',                             database='db',                             cursorclass=pymysql.cursors.DictCursor)with connection:    with connection.cursor() as cursor:        # Create a new record        sql = "INSERT INTO `users` (`email`, `password`) VALUES (%s, %s)"        cursor.execute(sql, ('webmaster@python.org', 'very-secret'))    # connection is not autocommit by default. So you must commit to save    # your changes.    connection.commit()    with connection.cursor() as cursor:        # Read a single record        sql = "SELECT `id`, `password` FROM `users` WHERE `email`=%s"        cursor.execute(sql, ('webmaster@python.org',))        result = cursor.fetchone()        print(result)