OS.system- adding the output of OS .system output command to the command of another os system command

Question

I can use only python 2.6.6 and subprocess is not working so I need to use only os module Below is the program

import os 

server = raw_input("server name:")
var = "symaccess -sid 239 list -type init | grep \"{0}\"".format(server)
wwn = os.system(var)
init = 'symaccess -sid 239 -type init show {0}'.format(wwn)
print init
os.system(init)

above is the script I used to add an output of one os.system to another os.system, I got the first os.system executed but for the second one i.e os.system(unit) is not coming because the output of os.system(var) should be assigned to a variable to wwn. could someone tell how to assign a variable to os.system(init)

Here in this script, the output of var says some X should be assigned to own but it's not taking X it's taking it as 0. So need your help to sort this why it is taking zero instead of X. Finally this X should be placed at init variable at {0}.

Answer 1

os.system does not return the output of the command - it returns the errorlevel.

If you need command output, use

wwn = os.popen(var).read()

That will assign the output from command var to wwn.

Be warned - the output is returned completely, with the trailing newline. You might want to strip() it before using it.