大神帮忙看下20行的python代码,文件io和数据库插入太慢，pythonio,新学python,在做一

大神帮忙看下20行的python代码,文件io和数据库插入太慢，pythonio,新学python,在做一

新学python,在做一个把爬虫爬下来的股票数据从文件插入到mysql数据库,速度很慢,不知道瓶颈是文件处理还是sql插入问题,望大神不吝赐教,感激不尽!

# encoding: utf-8#!/usr/bin/pythonimport MySQLdbimport osdb = MySQLdb.connect(host="localhost",user="root",passwd="4242",\        db="STOCKS", charset="utf8", use_unicode=True)cursor = db.cursor()files = os.listdir("shanghaiHistory")for fileName in files:    print "start insert " + fileName    isTheFirstLine = True    for line in open("shanghaiHistory/" + fileName):        if isTheFirstLine:            isTheFirstLine = False            continue        lineList = line.split(',')        lineList.insert(0,fileName[:6])        sql = "insert into shanghaiHistory(Code,Date,Open,High,Low,Close,Volume,AdjClose)\                values ('%s','%s','%s','%s','%s','%s','%s','%s')" % tuple(lineList)        try:            cursor.execute(sql)            db.commit()        except:            db.rollback()db.close()

文件格式是形如:

Date,Open,High,Low,Close,Volume,Adj Close2012-12-21,0.9151,0.9151,0.9151,0.9151,000,0.91512012-12-20,0.896,0.898,0.896,0.898,22924300,0.8982012-12-19,0.895,0.898,0.895,0.897,37858100,0.8972012-12-18,0.896,0.896,0.895,0.896,43542500,0.8962012-12-17,0.895,0.897,0.895,0.896,41877700,0.8962012-12-14,0.895,0.897,0.894,0.897,35734700,0.8972012-12-13,0.894,0.896,0.894,0.895,11613800,0.8952012-12-12,0.89,0.895,0.89,0.894,26586500,0.894

两个多小时才插入45W条数据,怎么才能提速一点呢.

编橙之家文章，