Paramiko SFTP username/password authentication via SOCKS proxy

paramiko-sftp.py

import paramiko
import socket
import socks

# set up SOCKS proxy
socks.setdefaultproxy(socks.PROXY_TYPE_SOCKS5, proxy_details['host'],
    proxy_details['port'], True, proxy_details['username'], 
    proxy_details['password'])
socket.socket = socks.socksocket

# initialize paramiko ssh client
transport = paramiko.SSHClient()
# ignore missing host key as we rely on username/password auth
transport.set_missing_host_key_policy(paramiko.AutoAddPolicy())
# connect() automatically uses the SOCKS proxy socket
transport.connect(auth_credentials['host'], username = auth_credentials['user_name'],
    password = auth_credentials['password'])
    
# start SFTP Client from SSH transport
sftp = paramiko.SFTPClient.from_transport(transport.get_transport())

# do stuff

# cleanup
sftp.close()
transport.close()

Does it still work for you? I use python 3 and I get the following error:
GeneralProxyError: Socket error: SOCKS5 proxy server sent invalid data

Currently, at least, with Python 3.6 works