python中封装pymysql库连接mysql数据库

import pymysql

class  MysqlHandler:
    #建立数据库连接，新建一个查询页面
    def __init__(self):
        # port要转为int
        self.mysql = pymysql.connect(host=handler.get_option_value("mysql", "connection"),
                            user=handler.get_option_value("mysql", "user"),
                            password=handler.get_option_value("mysql", "password"),
                            port= int(handler.get_option_value("mysql", "port")), charset="utf8", autocommit=True)
        self.cursor = self.mysql.cursor(pymysql.cursors.DictCursor)   # fetchone 是字典 fetchall是list套dict

    #获取查询结果,结果是dict,上面建立游标指定了是dict
    def query_one(self,sql):
        self.cursor.execute(sql)
        data = self.cursor.fetchone()
        return data

    #关闭查询页面，关闭连接
    def close(self):
        self.cursor.close()
        self.mysql.close()