import urllib2
def download(url, szFileName = ""): #szFileName:下载文件到的目标路径
    if szFileName == "":
        szFileName = url[url.rfind(‘/‘) + 1:]

    print "正在下载" + szFileName + "..."

    f = urllib2.urlopen(url)
    data = f.read()
    dest = open(szFileName,"wb")
    dest.write(data)
    dest.close()