python语言实现postgresql

#!/usr/bin/env python

# -*- coding: utf8 -*-

import sys,os,time

db_user = 'postgres'

db_pwd = 'postgres'

db_port = '5432'

db_name = 'CCIC2'

backup_path = '/home/sunjc/backupdb/'

cmd_path = '/usr/local/pgsql/bin/'

log_path = backup_path + 'log'

# 创建日志函数

def writeLogs(filename,contents):

  f = file(filename,'aw')

  f.write(contents)

  f.close()

today = backup_path + time.strftime('%Y-%m-%d')

fname = today + os.sep + time.strftime('%Y-%m-%d') + '_' + db_name + '.backup'

# 创建备份目录

if not os.path.exists(today):

   Msg = '-'*30 + time.strftime('%Y-%m-%d,%H:%M:%S') + '-'*30 + '\n'

   if(os.mkdir(today)) == None:

       Msg += '** 成功创建备份目录： ' + today + '\n\n'

       writeLogs(log_path,Msg)

   else:

       Msg += '!! 创建备份目录： ' + today + '失败，请检查目录是否可写！\n\n'

       writeLogs(log_path,Msg)

       sys.exit()

# 备份 CCIC2数据库

cmd_dump = "%spg_dump -i -h localhost -p %s -U %s -F c -b -v -f %s %s" % \

               (cmd_path,db_port,db_user,fname,db_name)

# 执行备份命令

if os.system(cmd_dump) == 0:

   writeLogs(log_path,'数据备份为： ' + fname + '\n')

else:

   writeLogs(log_path,'数据备份失败！\n')