Python 操作FTP

 import sys, os, ftplib, socket

 CONST_HOST = "FTP服务器地址"
 CONST_USERNAME = "FTP用户名"
 CONST_PWD = "FTP密码"

 CONST_BUFFER_SIZE = 

 class FtpHelper(object):
     ftp = None

     def __init__(self):
         self.ftp = self.connect()

     def connect(self):
         try:
             ftp = ftplib.FTP(CONST_HOST)
             ftp.login(CONST_USERNAME, CONST_PWD)
             return ftp
         except socket.error, socket.gaierror:
             print("FTP is unavailable,please check the host,username and password!")
             sys.exit()

     def disconnect(self):
         self.ftp.quit()

     def upload(self, ftppath, filepath):
         f = open(filepath, "rb")
         self.ftp.cwd(ftppath)
         file_name = os.path.split(filepath)[-]
         try:
             self.ftp.storbinary('STOR %s'%file_name, f, CONST_BUFFER_SIZE)
         except ftplib.error_perm:
             return False
         return True

     def download(self, ftppath, filename):
         f = open(filename, "wb").write
         self.ftp.cwd(ftppath)
         try:
             self.ftp.retrbinary("RETR %s"%filename, f, CONST_BUFFER_SIZE)
         except ftplib.error_perm:
             return False
         return True

     def list(self):
         self.ftp.dir()

     def find(self, ftppath, filename):
         self.ftp.cwd(ftppath)
         ftp_f_list = self.ftp.nlst()
         if filename in ftp_f_list:
             return True
         else:
             return False

 if __name__ == "__main__":
     fh = FtpHelper()
     fh.list()