Python通过pymysql连接数据库并进行查询和更新SQL方法封装

1、通过pymysql连接数据库并进行数据库操作
2、查询数据
3、更新修改SQL方法封装

import pymysql.cursors
import json

class OperationMysql:
    def __init__(self):
        self.conn = pymysql.connect(
            host='127.0.0.1',
            port=3306,
            user='test',
            passwd='',
            db='test',

            charset='utf8',
            cursorclass=pymysql.cursors.DictCursor
        )
        self.cur = self.conn.cursor()

    # 查询一条数据
    def search_one(self, sql):
        self.cur.execute(sql)
        result = self.cur.fetchone()
        return result

    # 更新SQL
    def updata_one(self, sql):
        self.cur.execute(sql)
        self.conn.commit()
        self.conn.close()

if __name__ == '__main__':
    op_mysql = OperationMysql()
    res = op_mysql.search_one("SELECT * from order WHERE order_no='M191023401681654'")
    print(res)