问Python paramiko SFTP IOError

EN

import paramiko
import os

local_path = "/home/user/Desktop/test"
remote_path = "/home/user/files/html/"

ssh = paramiko.SSHClient()

ssh.set_missing_host_key_policy(paramiko.AutoAddPolicy())
ssh.connect('ipaddress', username="user", password="user")

sftp = ssh.open_sftp()
for root, dirs, files in os.walk(local_path):
    for fname in files:
        full_fname = os.path.join(root, fname)
        sftp.put(full_fname, remote_path)

sftp.close()
ssh.close()

Traceback (most recent call last):
  File "ftp_test.py", line 16, in <module>
    sftp.put(full_fname, remote_path)
  File "/usr/local/lib/python2.7/dist-packages/paramiko/sftp_client.py", line 669, in put
    return self.putfo(fl, remotepath, file_size, callback, confirm)
  File "/usr/local/lib/python2.7/dist-packages/paramiko/sftp_client.py", line 621, in putfo
    with self.file(remotepath, 'wb') as fr:
  File "/usr/local/lib/python2.7/dist-packages/paramiko/sftp_client.py", line 327, in open
    t, msg = self._request(CMD_OPEN, filename, imode, attrblock)
  File "/usr/local/lib/python2.7/dist-packages/paramiko/sftp_client.py", line 729, in _request
    return self._read_response(num)
  File "/usr/local/lib/python2.7/dist-packages/paramiko/sftp_client.py", line 776, in _read_response
    self._convert_status(msg)
  File "/usr/local/lib/python2.7/dist-packages/paramiko/sftp_client.py", line 806, in _convert_status
    raise IOError(text)
IOError: Failure