#!/user/bin/python

 #coding=utf-8

 import ftplib

 import os

 import socket

 HOST = 'ftp.kernel.org'

 DIRN = 'pub/linux/kernel'

 FILE = 'README'

 def main():

     try:

         f = ftplib.FTP(HOST)

     except(socket.error,socket.gaierror) as e:

         print "Error:cannot reach '%s'"%HOST

         return

     print " connected to host '%s'"%HOST

     try:

         f.login()

     except ftplib.error_perm:

         print "Error:cannot login anonymously"

         f.quit()

         return

     print " Login as anonymous."

     try:

         f.cwd(DIRN)

     except ftplib.error_perm:

         print "Error:cannot CD to '%s'"%DIRN

         f.quit()

         return

     print " changed to '%s'"%DIRN

     try:

         f.retrbinary('RETR %s'%FILE,open(FILE,"wb").write)

     except ftplib.error_perm:

         print "Error:cannot read file '%s'"%FILE

         os.unlink(FILE)

     else:

         print " Download '%s' to cwd"%FILE

     f.quit()

 if __name__=="__main__":

     main()

 #!/usr/bin/python

 #coding=utf-8

 #上传文件

 from ftplib import FTP

 import sys,getpass,os.path

 host,username,localfile,remotepath = sys.argv[1:]

 password=getpass.getpass("Enter password for %s on %s"%(username,host))

 f=FTP(host)

 f.login(username,password)

 print remotepath

 f.cwd(remotepath)

 print f.dir()

 print localfile

 fd=open(localfile,'rb')

 f.storbinary('STOP test',fd)

 fd.close()

 f.quit()

 if __name__=="__main__":

     main()