Question

Can anyone tell me what’s wrong in this code:

#!/usr/local/bin/python

import os
import string, sys

a='sys.argv[1]'
b='sys.argv[2]'
os.system("scp a:/export/home/sample/backup.sql  b:/home/rushi/abc.sql")

it’s giving the following error:

ssh: a: node name or service name not known

Answer 1

What is wrong:

1. a and b don’t have second and third values of sys.argv as you might’ve intended
2. a and b are not related to the os.system call
3. you’re using os.system
4. you’re importing module that you’re not using

How to fix:

1. use a = sys.argv[1] without the quotes, same for b.
2. use .format method or similar % to format a string
3. have a look at subprocess module
4. don’t import string