python脚本 FTP上传学习

学习了这个博文http://www.cnblogs.com/cacique/archive/2012/08/24/2653686.html，楼主这个文章很适合初学者，所以根据楼主的内容推演了下上传文件的操作，贴下代码：

import ftplib
import os
import socket
User = 'admin'
Password = '****'
HOST = '***.***.***.103'
DIRN = '.'
FILE = '123.jpg'
LocalFile = '%s123.jpg' % "D:\\123\\"

def main():
    try:
        f = ftplib.FTP(HOST)
    except (socket.error, socket.gaierror):
        print 'ERROR:cannot reach " %s"' % HOST
        return
    print '***Connected to host "%s"' % HOST

    try:
        f.login(User,Password)
    except ftplib.error_perm:
        print 'ERROR: cannot login anonymously'
        f.quit()
        return
    print '*** Logged in as "anonymously"'
    try:
        f.cwd(DIRN)
    except ftplib.error_perm:
        print 'ERRORL cannot CD to "%s"' % DIRN
        f.quit()
        return
    print '*** Changed to "%s" folder' % DIRN

    try:

        f.storbinary('STOR %s' % FILE, open(LocalFile, 'rb'))
    except ftplib.error_perm:
        print 'ERROR: cannot read file "%s"' % FILE
        os.unlink(FILE)
    else:
        print '*** Uploaded "%s" to CWD' % FILE

    f.quit()
    return

if __name__ == '__main__':
    main()