Python数据库连接池DBUtils.PooledDB

1. 未使用连接池连接mysql

import MySQLdb
conn = MySQLdb.connect(host = '127.0.0.1', user ='user1', passwd = 'your-password', db ='db1', port = 3306)  
cur = conn.cursor()
SQL ="select * from t1"
r = cur.execute(SQL)
r = cur.fetchall()
cur.close()
conn.close()

2. 使用连接池连接mysql

# -*- coding: utf-8 -*-
import MySQLdb
from DBUtils.PooledDB import PooledDB

#5为连接池里的最少连接数
pool = PooledDB(MySQLdb, 5, host = '127.0.0.1', user = 'user1', passwd = 'your-password', db = 'db1', port = 3306) 

#后续每次需要数据库连接用connection（）函数获取连接即可。
conn = pool.connection()  
cur = conn.cursor()
SQL = "select * from t1"
r = cur.execute(SQL)
r = cur.fetchall()
cur.close()
conn.close()