python链接远程ftp服务器并列出目录下的文件，这段python代码用到了pysftp模块，使用sftp协议，对数据进行加密传输

import pysftp      srv = pysftp.Connection(host="your_FTP_server", username="your_username",  password="your_password")      # Get the directory and file listing  data = srv.listdir()      # Closes the connection  srv.close()      # Prints out the directories and files, line by line  for i in data:      print i