How to take the tar backup files form remote server to local server

[sivareddy]

import os, subprocess, psutil
import sys
import tarfile
COMMAND="ls -la"

HOST=input("Please enter old server: ")

ssh_option="-o StrictHostKeyChecking=no"
ssh = subprocess.Popen(["ssh", ssh_option,"%s" % HOST, COMMAND],shell=False,stdout=subprocess.PIPE,stderr=subprocess.PIPE)
result = ssh.stdout.readlines()
if result == []:
error = ssh.stderr.readlines()
print >>sys.stderr, "ERROR: %s" % error
print(" if test")
else:
COMMAND1=subprocess.call(['python tartest.py']) #i what to run command script on remote server and take backupfiles in to local server
ssh_tar_baekup = subprocess.Popen(["ssh", ssh_option,"%s" % HOST,COMMAND1],shell=True,stdout=subprocess.PIPE,stderr=subprocess.PIPE)
-----------------------
cat tartest.py
import os
import subprocess
from contextlib import closing
import sys
import tarfile
with closing(tarfile.open("/var/tmp/back_siva/siva.tar.gz","w:gz")) as tar:
for file in ["/var/tmp/back_siva/yp.conf","/var/tmp/back_siva/ypserv.conf"]:
tar.add(os.path.basename(file))
-----------------------------------------------

Please enter old server: xxxxxx
Traceback (most recent call last):
File "testsiva1.py", line 17, in <module>
COMMAND1=subprocess.call(['python tartest.py'])
File "/usr/lib64/python2.7/subprocess.py", line 524, in call
return Popen(*popenargs, **kwargs).wait()
File "/usr/lib64/python2.7/subprocess.py", line 711, in __init__
errread, errwrite)
File "/usr/lib64/python2.7/subprocess.py", line 1327, in _execute_child
raise child_exception
OSError: [Errno 2] No such file or directory