sudo apt-get install mysql-server

sudo apt-get install python-mysqldb

create database testdb;

create user 'testuser'@'127.0.0.1' identified by 'test123';
grant all privileges on testdb.* to 'testuser'@'127.0.0.1';

_mysql module

#!/usr/bin/python
# -*- coding: utf-8 -*-

import _mysql
import sys

try:
 con = _mysql.connect('127.0.0.1', 'testuser', 'test123', 'testdb')
 con.query("SELECT VERSION()")
 result = con.use_result()

 print "MYSQL version : %s " % result.fetch_row()[0]

except _mysql.Error, e:
 print "Error %d: %s %s" % (e.args[0], e.args[1])
 sys.exit(1)

finally:
 if con:
  con.close()

#!/usr/bin/python
# -*- coding: utf-8 -*-

import MySQLdb as mysql

try:
 conn = mysql.connect('127.0.0.1', 'testuser', 'test123', 'testdb')
 cur = conn.cursor()
 cur.execute("SELECT VERSION()")

 version = cur.fetchone()
 print "Database version : %s" % version

except mysql.Error, e:
 print "Error %d:%s" % (e.args[0], e.args[1])
 exit(1)

finally:
 if conn:
  conn.close()

#!/usr/bin/python

# -*- coding: utf-8 -*-

import MySQLdb as mysql

conn = mysql.connect('127.0.0.1', 'testuser', 'test123', 'testdb');

with conn:
 cur = conn.cursor()
 cur.execute("DROP TABLE IF EXISTS writers");
 cur.execute("CREATE TABLE writers(id INT PRIMARY KEY AUTO_INCREMENT, name varchar(25))")
 cur.execute("insert into writers(name) values('wangzhengyi')")
 cur.execute("insert into writers(name) values('bululu')")
 cur.execute("insert into writers(name) values('chenshan')")

select * from writers;

#!/usr/bin/python

import MySQLdb as mysql

conn = mysql.connect('127.0.0.1', 'testuser', 'test123', 'testdb');

with conn:
 cursor = conn.cursor()
 cursor.execute("select * from writers")
 rows = cursor.fetchall()

 for row in rows:
  print row

(1L, 'wangzhengyi')
(2L, 'bululu')
(3L, 'chenshan')

#!/usr/bin/python

import MySQLdb as mysql

conn = mysql.connect('127.0.0.1', 'testuser', 'test123', 'testdb');

with conn:
 cursor = conn.cursor(mysql.cursors.DictCursor)
 cursor.execute("select * from writers")
 rows = cursor.fetchall()

 for row in rows:
  print "id is %s, name is %s" % (row['id'], row['name'])

id is 1, name is wangzhengyi
id is 2, name is bululu
id is 3, name is chenshan

#!/usr/bin/python

import MySQLdb as mysql

conn = mysql.connect('127.0.0.1', 'testuser', 'test123', 'testdb');

with conn:
 cursor = conn.cursor(mysql.cursors.DictCursor)
 cursor.execute("select * from writers where id = %s", "3")
 rows = cursor.fetchone()
 print "id is %d, name is %s" % (rows['id'], rows['name'])

#!/usr/bin/python

# -*- coding: utf-8 -*-

import MySQLdb as mysql


try:
 conn = mysql.connect('127.0.0.1', 'testuser', 'test123', 'testdb');
 cur = conn.cursor()
 cur.execute("insert into writers(name) values('wangzhengyi4')")
 cur.execute("insert into writers(name) values('bululu5')")
 cur.execute("insert into writerss(name) values('chenshan6')")

 conn.commit()

except mysql.Error, e:
 if conn:
  conn.rollback()
  print "Error happens, rollback is call"

finally:
 if conn:
  conn.close()

Error happens, rollback is call