首页 > 代码库 > Python3链接MySQL数据库

Python3链接MySQL数据库

2024-07-15 21:48:38   221人阅读

Python 2.x 上连接MySQL的库倒是不少的，其中比较著名就是MySQLdb（Django项目都使用它；我也在开发测试系统时也使用过），见：http://sourceforge.net/projects/mysql-python/

不过，目前MySQLdb并不支持python3.x，网上找了一些方法，后来我还是偶然发现MySQL官方已经提供了MySQL连接器，而且已经有支持Python3.x的版本了。MySQL Connector/Python, a self-contained Python driver for communicating with MySQL servers. 这个用起来还是感觉比较顺手的。
关于MySQL Connector/Python的各种介绍、安装、API等文档，还是参考官网吧：http://dev.mysql.com/doc/connector-python/en/index.html
（注意：安装程序将关于MySQL Connnector的python2的源文件复制到了python3库的位置（运行时会报语法错误），我就直接手动复制了其中python3/目录下的文件过去就解决。）

另外，Python3.x连接MySQL的其他方案有：oursql, PyMySQL, myconnpy 等，参考如下链接：

http://packages.python.org/oursql/

https://github.com/petehunt/PyMySQL/

https://launchpad.net/myconnpy

下面只是贴一个试用 MySQL Connector/Python 的Python脚本吧（包括创建表、插入数据、从文件读取并插入数据、查询数据等）：

View Code PYTHON
 
123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566
#!/usr/bin/python3# a sample to use mysql-connector for python3# see details from   http://dev.mysql.com/doc/connector-python/en/index.html import mysql.connectorimport sys, os user = ‘root‘pwd  = ‘123456‘host = ‘127.0.0.1‘db   = ‘test‘ data_file = ‘mysql-test.dat‘ create_table_sql = "CREATE TABLE IF NOT EXISTS mytable (                     id int(10) AUTO_INCREMENT PRIMARY KEY, 		    name varchar(20), age int(4) ) 		    CHARACTER SET utf8" insert_sql = "INSERT INTO mytable(name, age) VALUES (‘Jay‘, 22 ), (‘杰‘, 26)"select_sql = "SELECT id, name, age FROM mytable" cnx = mysql.connector.connect(user=user, password=pwd, host=host, database=db)cursor = cnx.cursor() try:    cursor.execute(create_table_sql)except mysql.connector.Error as err:    print("create table ‘mytable‘ failed.")    print("Error: {}".format(err.msg))    sys.exit() try:    cursor.execute(insert_sql)except mysql.connector.Error as err:    print("insert table ‘mytable‘ failed.")    print("Error: {}".format(err.msg))    sys.exit() if os.path.exists(data_file):    myfile = open(data_file)    lines = myfile.readlines()    myfile.close()     for line in lines:        myset = line.split()        sql = "INSERT INTO mytable (name, age) VALUES (‘{}‘, {})".format(myset[0], myset[1])        try:            cursor.execute(sql)        except mysql.connector.Error as err:            print("insert table ‘mytable‘ from file ‘mysql-test.dat‘ -- failed.")            print("Error: {}".format(err.msg))            sys.exit() try:    cursor.execute(select_sql)    for (id, name, age) in cursor:        print("ID:{}  Name:{}  Age:{}".format(id, name, age))except mysql.connector.Error as err:    print("query table ‘mytable‘ failed.")    print("Error: {}".format(err.msg))    sys.exit() cnx.commit()cursor.close()cnx.close()

另外，最后再贴一个使用MySQLdb的python2.x代码示例吧：

View Code PYTHON
 
12345678910111213141516171819202122232425262728
#!/usr/bin/python2.7# coding=utf-8 import MySQLdbimport sys host = ‘localhost‘user = ‘root‘pwd  = ‘123456‘   # to be modified.db   = ‘test‘  if __name__ == ‘__main__‘:    conn = MySQLdb.connect(host, user, pwd, db, charset=‘utf8‘);    try:        conn.ping()    except:        print ‘failed to connect MySQL.‘    sql = ‘select * from mytable where id = 2‘    cur = conn.cursor()    cur.execute(sql)    row = cur.fetchone()#    print type(row)    for i in row:        print i    cur.close()    conn.close()    sys.exit()
 

 


联系
我们