import pysftp
remotepath = '/home/a7user/sftp/sftp/CentralData/'
localpath = 'E:\backup\'
cnopts = pysftp.CnOpts()
cnopts.hostkeys = None

with pysftp.Connection(host='xx.xxx.xx.xx',username='user',password='5fTPt00',cnopts=cnopts) as sftp:

 sftp.put_d(localpath,remotepath)
 print('Upload finished')