python实现ftp传输，pythonftp传输,import ftpli

python实现ftp传输，pythonftp传输,import ftpli

import ftplib, sysftp1 = ftplib.FTP('127.0.0.1', 'book', 'bookpw')ftp1.cwd('/Dir')ftp2 = ftplib.FTP('www.holdenweb.com', 'bookuser', 'bookpw')ftp2.cwd('/public')sock1 = ftp1.transfercmd('RETR a.zip')sock2 = ftp2.transfercmd('STOR b.zip')flen = 0                            while 1:    block = sock1.recv(1024)            if len(block) == 0:                     break    flen += len(block)                  while len(block) > 0:                   sentlen = sock2.send(block)         block = block[sentlen:]     print 'Transferred', flen, 'bytes'sock1.close()sock2.close()ftp1.quit()ftp2.quit()