pip3 install pycrypto
pip3 install paramiko

import os
import paramiko

def RemoteScp(host_ip, host_port, host_username, host_password, remote_file, local_file):
  scp = paramiko.Transport((host_ip, host_port))
  scp.connect(username=host_username, password=host_password)
  sftp = paramiko.SFTPClient.from_transport(scp)
  sftp.get(remote_file, local_file)
  scp.close()
  return ("success")

if __name__ == '__main__':
  host_ip = '192.168.1.123'
  host_port = 22
  host_username = 'root'
  host_password = 'password'
  remote_path = '/tmp/test.sql'
  local_path = '/tmp/test.sql'
  RemoteScp(host_ip, host_port, host_username, host_password, remote_path, local_path)

import os
import paramiko

def RemoteScp(host_ip, host_port, host_username, host_password, remote_path, local_path):
  scp = paramiko.Transport((host_ip, host_port))
  scp.connect(username=host_username, password=host_password)
  sftp = paramiko.SFTPClient.from_transport(scp)
  try:
    remote_files = sftp.listdir(remote_path)
    for file in remote_files:  #遍历读取远程目录里的所有文件
      local_file = local_path + file
      remote_file = remote_path + file
      sftp.get(remote_file, local_file)
  except IOError:  # 如果目录不存在则抛出异常
    return ("remote_path or local_path is not exist")
  scp.close()


if __name__ == '__main__':
  host_ip = '192.168.1.123'    # 远程服务器IP
  host_port = 22          # 远程服务器端口
  host_username = 'root'      #远程服务器用户名
  host_password = 'password'    #远程服务器密码
  remote_path = '/tmp/'      #这个是远程目录
  local_path = '/tmp/'       #这个是本地目录
  RemoteScp(host_ip, host_port, host_username, host_password, remote_path, local_path) #调用方法