管理多个数据库，利用循环来连接数据库，但是其中一个数据库无法访问，程序就结束了。

def loading_config(): 
    try:
            ts = DBconfig.RUN_TIME
            while True:
                    i=0
                    while DBconfig.DBS[i]:
                            head = DBconfig.DBS[i][0]
                            print '-----HOST   :',head[:3],'------------------------'
                            dhost    = DBconfig.DBS[i][0]
                            dport    = DBconfig.DBS[i][1]
                            duser    = DBconfig.DBS[i][2]
                            dpass    = DBconfig.DBS[i][3]
                            ddb      = DBconfig.DBS[i][4]
                            create_mysql(dhost,dport,duser,dpass,ddb,head)
                            main_function(dhost,dport,duser,dpass,ddb,head)
                            print '-----US-time:',time.ctime(),'---'
                            i +=1
                    time.sleep(ts)
    except Exception,e:
        print 'loading_config error!',e

贴上代码那一刻，突然发现自己好蠢.....

已解决：

def loading_config(): 
    ts = DBconfig.RUN_TIME
    while True:
            i=0
            while DBconfig.DBS[i]:
                    head = DBconfig.DBS[i][0]
                    print '-----HOST   :',head[:3],'------------------------'
                    dhost    = DBconfig.DBS[i][0]
                    dport    = DBconfig.DBS[i][1]
                    duser    = DBconfig.DBS[i][2]
                    dpass    = DBconfig.DBS[i][3]
                    ddb      = DBconfig.DBS[i][4]
                    try:
                        create_mysql(dhost,dport,duser,dpass,ddb,head)
                        main_function(dhost,dport,duser,dpass,ddb,head)
                    except Exception,e:
                        print 'loading_config error'
                        print e
                    print '-----US-time:',time.ctime(),'---'
                    i +=1
            time.sleep(ts)

不过回到最初的代码，好像只要异常发生就不能继续循环了？无解吗....