Usage of Python MySQLdb

　　最近在用 Tornado 框架做后端，需要在 python 脚本中执行大量 MySQL 语句，特将常用 API 封装成以下库函数。

 1 # -*- coding: utf-8 -*-
 2 from datetime import datetime,timedelta
 3 from string import atoi,atof
 4 import logging
 5 import MySQLdb
 6 import urllib
 7 import urllib2
 8 import json
 9 import sys
10 import os
11
12
13 def mysql_start(conf_path):
14     global __conn, __cursor
15     mysql_conf = {}
16     execfile(conf_path,mysql_conf)
17     rainbow = mysql_conf[‘mysql‘]
18     __conn = MySQLdb.connect(host=rainbow[‘host‘],port=rainbow[‘port‘],user=rainbow[‘user‘],19             passwd=rainbow[‘passwd‘],db=rainbow[‘db‘],charset=rainbow[‘charset‘])
20     __cursor = __conn.cursor()
21
22
23 def mysql_exec(*cmd):
24     global __conn, __cursor
25     if len(cmd)==1:
26         __cursor.execute(cmd[0])
27     elif len(cmd)==2:
28         __cursor.execute(cmd[0],cmd[1])
29     else:
30         raise AssertionError()
31     __conn.commit()
32     return __cursor.fetchall()
33
34
35 def mysql_show(*cmd):
36     try:
37         res = mysql_exec(*cmd)
38         for item in res:
39             print item
40     except Exception, e:
41         print "MySQL Execution Error: "+str(e)
42
43
44 def mysql_close():
45     global __conn, __cursor
46     __cursor.close()
47     __conn.close()
48
49
50 def http_querry(domain,port,path,argv):
51     # path should start with char ‘/‘
52     url = ‘http://‘+domain+‘:‘+port+path+‘?‘53             +urllib.urlencode(argv)
54     try:
55         return urllib2.urlopen(url).read()
56     except urllib2.HTTPError,e:
57         print str(e.code)+": "+url
58 59

　　常用 MySQL 命令可参考mr-wid的 21分钟MySQL入门教程 。