Python操作MySQL数据库

http://www.imooc.com/learn/475（慕课网视频）

Python DB API 封装Python到数据库服务器之间的操作

import MySQLdb:

        需要下载mysql-python(https://sourceforge.net/projects/mysql-python/#)

        安装需要先安装python2.7

一下内容转载自：http://blog.csdn.net/seven_zhao/article/details/16939053

windows7 64 bits 安装 MySQL-Python-1.2.4b4.win32-py2.7.exe



安装时提示需要python2.7，但是此时python2.7已经添加到环境变量中，要解决这个问题，可以使用如下的方法：

在D盘新建register.py的文件，内容如下：

#   

# script to register Python 2.0 or later for use with win32all   

# and other extensions that require Python registry settings   

#   

# written by Joakim Loew for Secret Labs AB / PythonWare   

#   

# source:   

# http://www.pythonware.com/products/works/articles/regpy20.htm   

#   

# modified by Valentine Gogichashvili as described in http://www.mail-archive.com/distutils-sig@python.org/msg10512.html   

   

import sys  

   

from _winreg import *  

   

# tweak as necessary   

version = sys.version[:3]  

installpath = sys.prefix  

   

regpath = "SOFTWARE\\Python\\Pythoncore\\%s\\" % (version)  

installkey = "InstallPath"  

pythonkey = "PythonPath"  

pythonpath = "%s;%s\\Lib\\;%s\\DLLs\\" % (  

    installpath, installpath, installpath  

)  

   

def RegisterPy():  

    try:  

        reg = OpenKey(HKEY_CURRENT_USER, regpath)  

    except EnvironmentError as e:  

        try:  

            reg = CreateKey(HKEY_CURRENT_USER, regpath)  

            SetValue(reg, installkey, REG_SZ, installpath)  

            SetValue(reg, pythonkey, REG_SZ, pythonpath)  

            CloseKey(reg)  

        except:  

            print "*** Unable to register!"  

            return  

        print "--- Python", version, "is now registered!"  

        return  

    if (QueryValue(reg, installkey) == installpath and  

        QueryValue(reg, pythonkey) == pythonpath):  

        CloseKey(reg)  

        print "=== Python", version, "is already registered!"  

        return  

    CloseKey(reg)  

    print "*** Unable to register!"  

    print "*** You probably have another Python installation!"  

   

if __name__ == "__main__":  

    RegisterPy()  

然后运行这个python文件，效果如下：



然后在重新安装就没有问题了。

连接数据库

数据库连接对象connection，创建方法：MySQLdb.connect(参数)

数据库游标对象cursor{execute(sql),fetchone,fetchmany,fetchall,rowcount,close} 

import MySQLdb

conn = MySQLdb.connect(
host='127.0.0.1',
port=3306,
user='root',
 passwd='1234',
db='imooc',
charset='utf8'
)
cursor=conn.cursor()
print conn
print cursor
cursor.close()
conn.close()

对查询到的数据进行处理

cursor=conn.cursor()
sql='select * from user'
cursor.execute(sql)

rs=cursor.fetchall()
for row in rs:
print 'user_id=%s,user_name=%s'% row