Python 用多线程上传和下载文件

 # -*- coding: utf-8 -*-
 __author__ = 'louis'
 
 from ftplib import FTP
 import multiprocessing
 import time
 
 def ftpconnect():
     ftp = FTP()
     timeout = 30
     port = 22
     ftp.connect('localhost',port,timeout) # 连接FTP服务器
     ftp.login('user','password') # 登录
     return ftp
 
 def upload(FileName, FileLocalation):
     ftp = ftpconnect()
     # print ftp.getwelcome() # 获得欢迎信息
     ftp.cwd(r"") # 设置FTP路径
     for i in range(len(FileName)):
         print "%s The start of upload, %s" % (time.ctime(),FileName[i])
         fp = open(FileLocalation[i], 'rb')
 
         ftp.storbinary('STOR ' + FileName[i], fp)
         fp.close()
         print "%s The end of the %s" % (time.ctime(), FileName[i])
     ftp.quit() # 退出FTP服务器
 
 def download(FileName, FilePath):
     ftp = ftpconnect()
     ftp.cwd(r"") # 设置FTP路径
     for i in range(len(FileName)):
         print "%s The start of downloading, %s" % (time.ctime(), FileName[i])
         file_handle = open(FilePath[i], 'w').write
 
         ftp.retrbinary("RETR " + FileName[i], file_handle)
         print "%s The end of the %s" % (time.ctime(), FileName[i])
 
     ftp.quit()
 
 if __name__=='__main__':
     # 上传视频文件到服务器  前提是在c:\te中，已经有1000个视频文件，它们的名字分别是1.avi, 2.avi. 3.avi, ..., 1000.avi
     # p = [None]*1000
     # filelocal = r'c:\Te'
     #
     # for i in range(20):
     #     baiWei = i * 50
     #     filename = [None] * 50
     #     filelocalation = [None] * 50
     #     for j in range(50):
     #         filename_pre = baiWei + j + 1
     #         filename[j] = "%s.avi" % filename_pre
     #         filelocalation[j] = filelocal + "\\" + filename[j]
     #     print filelocalation
     #     p[i] = multiprocessing.Process(target=upload, args=(filename, filelocalation))
     #
     # for i in range(20):
     #     p[i].start()
 
     # 下载视频文件到本地,  前提是ftp服务器中已经有100个视频文件，它们的名字是1.avi, 2.avi, 3.avi, ..., 100.avi
     p = [None]*100
     fileDir = r'D:\local'
     for i in range(10):
         shiWei = i * 10
         fileName = [None]*10
         filePath = [None]*10
         for j in range(10):
             fileName_pre = shiWei + j + 1
             fileName[j] = "%s.avi" % fileName_pre
             filePath[j] = fileDir + "\\" + fileName[j]
         print filePath
         p[i] = multiprocessing.Process(target=download, args=(fileName, filePath))
 
     for i in range(10):
         p[i].start()