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import pymysql from DBUtils.PooledDB import PooledDB class mysqlClinet(object): def __init__(self): self.POOL = PooledDB( creator=pymysql, # 使用链接数据库的模块 maxconnections=6, # 连接池允许的最大连接数,0和None表示不限制连接数 mincached=2, # 初始化时,链接池中至少创建的空闲的链接,0表示不创建 maxcached=5, # 链接池中最多闲置的链接,0和None不限制 maxshared=1, # 链接池中最多共享的链接数量,0和None表示全部共享。PS: 无用,因为pymysql和MySQLdb等模块的 threadsafety都为1,所有值无论设置为多少,_maxcached永远为0,所以永远是所有链接都共享。 blocking=True, # 连接池中如果没有可用连接后,是否阻塞等待。True,等待;False,不等待然后报错 maxusage=None, # 一个链接最多被重复使用的次数,None表示无限制 setsession=[], # 开始会话前执行的命令列表。如:["set datestyle to ...", "set time zone ..."] ping=0, # ping MySQL服务端,检查是否服务可用。 # 如:0 = None = never, # 1 = default = whenever it is requested, # 2 = when a cursor is created, # 4 = when a query is executed, # 7 = always host='127.0.0.1', port=3306, user='root', password='', database='ziji', charset='utf8' ) def create_conn(self): conn = self.POOL.connection() cursor = conn.cursor(pymysql.cursors.DictCursor) return conn, cursor def close_conn(self, conn, cursor): conn.close() cursor.close() def select_one(self, sql, args): conn, cur = self.create_conn() cur.execute(sql, args) result = cur.fetchone() self.close_conn(conn, cur) return result def select_all(self, sql, args): conn, cur = self.create_conn() cur.execute(sql, args) result = cur.fetchall() self.close_conn(conn, cur) return result def insert_one(self, sql, args): conn, cur = self.create_conn() result = cur.execute(sql, args) conn.commit() self.close_conn(conn, cur) return result def delete_one(self, sql,args): conn,cur = self.create_conn() result = cur.execute(sql,args) conn.commit() self.close_conn(conn,cur) return result def update_one(self, sql,args): conn,cur = self.create_conn() result = cur.execute(sql,args) conn.commit() self.close_conn(conn,cur) return result
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