python实现自动下载sftp文件

#!/usr/bin/python
# coding=utf-8

import paramiko
import os

def sftp_download(sftp,localDir,remoteDir):
    if remoteDir.find(".") == -1:#判断远程目录参数是否是目录，前提是远程的文件名中都包含扩展名，否则此方法不可用
        for file in sftp.listdir(remoteDir):
            remoteDirTmp=os.path.join(remoteDir,file)
            localDirTmp=os.path.join(localDir,file)
            sftp_download(sftp,localDirTmp,remoteDirTmp)
    else:
        localPath=localDir.rpartition("/")[0]
        if not os.path.exists(localPath):
            os.makedirs(localPath)
        print("download file:",remoteDir)
        try:
            sftp.get(remoteDir,localDir)
        except Exception as e:
            print('download exception:',e)
    
    
if __name__ == '__main__':
    host = '192.168.149.128'#sftp主机 
    port = 22 #端口
    username = 'sftp' #sftp用户名
    password = '123456'  
    localDir = '/data/test'#本地文件或目录
    remoteDir = '/'#远程文件或目录
    sf = paramiko.Transport((host,port))
    sf.connect(username = username,password = password)
    sftp = paramiko.SFTPClient.from_transport(sf)
    sftp_download(sftp,localDir,remoteDir)
    sf.close()