How to check a remote path is a file or a directory?

os.path.isfile() and os.path.isdir() only work on local filenames.

I'd use the sftp.listdir_attr() function instead and load full SFTPAttributes objects, and inspect their st_mode attribute with the stat module utility functions:

import stat

def downLoadFile(sftp, remotePath, localPath):
    for fileattr in sftp.listdir_attr(remotePath):  
        if stat.S_ISDIR(fileattr.st_mode):
            sftp.get(fileattr.filename, os.path.join(localPath, fileattr.filename))

Below steps to be followed to verify if remote path is FILE or DIRECTORY:

1) Create connection with remote

transport = paramiko.Transport((hostname,port))
transport.connect(username = user, password = pass)
sftp = paramiko.SFTPClient.from_transport(transport)

2) Suppose you have directory "/root/testing/" and you would like to check through ur code.Import stat package

import stat

3) Use below logic to check if its file or Directory

fileattr = sftp.lstat('root/testing')
if stat.S_ISDIR(fileattr.st_mode):
    print 'is Directory'
if stat.S_ISREG(fileattr.st_mode):
    print 'is File' 

use module stat

import stat

for file in sftp.listdir(remotePath):  
    if stat.S_ISREG(sftp.stat(os.path.join(remotePath, file)).st_mode): 
        try:
            sftp.get(file, os.path.join(localPath, file))
        except:
            pass